SlideShare a Scribd company logo
Ethane
Conformation of Ethane
• When an ethane molecule rotates about it's carbon-
carbon single bond two extreme conformations can
be result, the staggered and eclipsed conformation.
• Here we will use Newman projection to discuss the
confirmation.
H
H
H
H H
H
H H
H
HH
H
60°
0°
Staggered Eclipsed
Rotation around bond
• If one of the methyl group is allowed to rotate
keeping the rest of molecule undisturbed and
number of possible arrangement can be
obtained.
60° 120°
360° 300°
240°
180°
H
HH
H
H
H
HH
H
H
H
H
H
H
H
HH
H
H
H H
H
H
H
H
H
HH
H
H
H
H
H
H H
H
H
H
H H
H
H
(I)- Eclipsed
Repulsion more
Energy more
Less stable
(II) - Staggered
Repulsion less
Energy less
More stable
(III)-Eclipsed
Repulsion more
Energy more
Less stable
(VI)-Staggered
Repulsion less
Energy less
More stable
(V)-Eclipsed
Repulsion more
Energy more
Less stable
(VII)-Eclipsed
Repulsion more
Energy more
Less stable
(IV)-Staggered
Repulsion less
Energy less
More stable
Energy level
• By doing so six possible confirmation can be
obtained out of which 3 are staggered (II,IV,VI)
and 3 are eclipsed form (I/VII,III,V).
• Potential energy of I,III,V,VII is greater than
that of II,IV,VI due to repulsive forces.
• Stability of II,IV,VI is greater than that of
I,III,V,VII.
I , III, V, VII > II , IV , VI
II, IV, VI > I , III , V , VII
Energy level diagram
n-Butane
CH3-CH2-CH3
C – C – C – C
H
H
HH
HH H
H
H
H
1 432
Kekule structure
Skeletal structure
condensed structure
Possible rotation for n-Butane
C – C – CH2-CH3
H
HH
HH
1 2
H3C – C – C – CH3
HH
H H
32
Rotation around C1 and C2
Rotation around C2 and C3
Structure I Structure II *
Conformations of n-Butane
• Butane has three carbon-carbon single bond
and molecule can rotate about each of them .
• If the rotation will be about C2 and C3 bond
then confirmation will be symmetrical.
• Different conformation of butane can be
obtained by rotating about its middle carbon-
carbon single bond.
60° 120°
360° 300°
240°
180°
H3C
H3CH3C
H3C
CH3
CH3
CH3CH3
CH3
H3C
CH3
CH3
H3C
CH3
H
HH
H
H
H H
H
H
H
H
H
HH
H
H
H
H
H
H H
H
H
H
H H
H
H
(I)-Fully Eclipsed
Very high Repulsion
Very high Energy
Least stable
(II) – Staggered(Gauche)
Moderate Repulsion
Moderate Energy
Moderately stable
(III)-Partly Eclipsed
Repulsion high
Energy high
Less stable
(IV)-Staggered (Anti)
Repulsion less
Energy less
More stable
(VII)-Fully Eclipsed
Very high Repulsion
Very high Energy
Least stable
(VI) – Staggered(Gauche)
Moderate Repulsion
Moderate Energy
Moderately stable
(V)-Partly Eclipsed
Repulsion high
Energy high
Less stable
Conformers of n-Butane
• Butane has 3 staggered (II,IV,VI) conformer.
• IV (Anti conformer), in which the two methyl
group are as far apart as possible is more
stable and require very less energy.
• II , VI (Gauche conformer)
• Butane has 3 eclipsed (I/VII,III,V)
• I and VII are fully eclipsed
• III and V are Partly eclipsed
Energy level
• Potential energy of I,VII is greater followed by
III,V and II,VI. Conformer IV require very less
energy because bulky group CH3 is far apart.
• Stability of IV is greater than that of II,VI
followed by III, V and I,VII.
I ,VII > III, V > II, VI > IV
IV > II, VI > III, V > I, VII
Energy level diagram
Conformation for n-Butane
C – C – CH2-CH3
H
HH
HH
1 2
Structure I
60° 120°
360°
300°
240°
180°
H3C
H3C
H3C
CH2-CH3
CH3
CH3
CH3
H3C-H2C
CH3
H
HH
H
H
H H
H
H
H
H
H
HH
H
H
H
H
H
H H
H
H
H
H H
H
H
CH2-CH3CH2-CH3
CH2-CH3
H3C-H2C
H3C-H2C
(I)- Eclipsed
Repulsion more
Energy more
Less stable
(II) - Staggered
Repulsion less
Energy less
More stable
(III)-Eclipsed
Repulsion more
Energy more
Less stable
(IV)-Staggered
Repulsion less
Energy less
More stable
(VI)-Staggered
Repulsion less
Energy less
More stable
(V)-Eclipsed
Repulsion more
Energy more
Less stable
(VII)-Eclipsed
Repulsion more
Energy more
Less stable
Energy level
• By doing so six possible confirmation can be
obtained out of which 3 are staggered (II,IV,VI)
and 3 are eclipsed form (I/VII,III,V).
• Potential energy of I,III,V,VII is greater than
that of II,IV,VI due to repulsive forces.
• Stability of II,IV,VI is greater than that of
I,III,V,VII.
I , III, V, VII > II , IV , VI
II, IV, VI > I , III , V , VII
Thank you my dear students...!!!

More Related Content

What's hot

Geometrical isomerism
Geometrical isomerismGeometrical isomerism
Geometrical isomerism
Rajkumar Kumawat
 
Optical isomerism
Optical isomerismOptical isomerism
Optical isomerism
Sowmiya Perinbaraj
 
Chemistry of Cycloalkanes
Chemistry of CycloalkanesChemistry of Cycloalkanes
Chemistry of Cycloalkanes
Ganesh Mote
 
D-L Nomenclature System
D-L Nomenclature SystemD-L Nomenclature System
D-L Nomenclature System
Rahmah Ather
 
Conformation of biphenyl compounds (Atropisomerism)
Conformation of biphenyl compounds (Atropisomerism)Conformation of biphenyl compounds (Atropisomerism)
Conformation of biphenyl compounds (Atropisomerism)
Drx Mathivanan Selvam
 
Atropisomerism
AtropisomerismAtropisomerism
Atropisomerism
Pradeep Swarnkar
 
STEREOSPECIFIC REACTION, STEREOSELECTIVE REACTION, OPTICAL PURITY, ENANTIOMER...
STEREOSPECIFIC REACTION, STEREOSELECTIVE REACTION, OPTICAL PURITY, ENANTIOMER...STEREOSPECIFIC REACTION, STEREOSELECTIVE REACTION, OPTICAL PURITY, ENANTIOMER...
STEREOSPECIFIC REACTION, STEREOSELECTIVE REACTION, OPTICAL PURITY, ENANTIOMER...
FCRYOUTUBE
 
Pyrrole (o.c iv)
Pyrrole (o.c iv)Pyrrole (o.c iv)
Pyrrole (o.c iv)
Srinivas Bhairy
 
Seminar on name reaction
Seminar on name reactionSeminar on name reaction
Seminar on name reaction
nitin lambe
 
Conformation and configuration sujith
Conformation and configuration   sujithConformation and configuration   sujith
Conformation and configuration sujith
SUJITH KP
 
METHODS OF DETERMINATION OF CONFIGURATION OF GEOMETRICAL ISOMERS.pptx
METHODS OF DETERMINATION OF CONFIGURATION OF GEOMETRICAL ISOMERS.pptxMETHODS OF DETERMINATION OF CONFIGURATION OF GEOMETRICAL ISOMERS.pptx
METHODS OF DETERMINATION OF CONFIGURATION OF GEOMETRICAL ISOMERS.pptx
DipeshGamare
 
Structure aromaticity and Huckels rule
Structure aromaticity and Huckels ruleStructure aromaticity and Huckels rule
Structure aromaticity and Huckels rule
zaryabhaider7
 
Biphenyl derivatives & Atropisomerism
Biphenyl derivatives & AtropisomerismBiphenyl derivatives & Atropisomerism
Biphenyl derivatives & Atropisomerism
PRUTHVIRAJ K
 
Asymmetric Synthesis - Christeena Shaji
Asymmetric Synthesis - Christeena ShajiAsymmetric Synthesis - Christeena Shaji
Asymmetric Synthesis - Christeena Shaji
Bebeto G
 
Conformational analysis of n butane
Conformational analysis of n butaneConformational analysis of n butane
Conformational analysis of n butane
MayurMarvaniya1
 
Unit 3 furan & thiophene
Unit 3 furan & thiopheneUnit 3 furan & thiophene
Unit 3 furan & thiophene
Sowmiya Perinbaraj
 
Heterocyclic compounds - Furan - Synthesis of furan - Characteristic reaction...
Heterocyclic compounds - Furan - Synthesis of furan - Characteristic reaction...Heterocyclic compounds - Furan - Synthesis of furan - Characteristic reaction...
Heterocyclic compounds - Furan - Synthesis of furan - Characteristic reaction...
Dr Venkatesh P
 
Elements of symmetry (optical isomers)
Elements  of  symmetry (optical isomers)Elements  of  symmetry (optical isomers)
Elements of symmetry (optical isomers)
Drx Mathivanan Selvam
 
Racemic modification (2)
Racemic modification (2)Racemic modification (2)
Racemic modification (2)
DILIP DAVHARE
 

What's hot (20)

Geometrical isomerism
Geometrical isomerismGeometrical isomerism
Geometrical isomerism
 
Optical isomerism
Optical isomerismOptical isomerism
Optical isomerism
 
Chemistry of Cycloalkanes
Chemistry of CycloalkanesChemistry of Cycloalkanes
Chemistry of Cycloalkanes
 
D-L Nomenclature System
D-L Nomenclature SystemD-L Nomenclature System
D-L Nomenclature System
 
Conformation of biphenyl compounds (Atropisomerism)
Conformation of biphenyl compounds (Atropisomerism)Conformation of biphenyl compounds (Atropisomerism)
Conformation of biphenyl compounds (Atropisomerism)
 
Atropisomerism
AtropisomerismAtropisomerism
Atropisomerism
 
STEREOSPECIFIC REACTION, STEREOSELECTIVE REACTION, OPTICAL PURITY, ENANTIOMER...
STEREOSPECIFIC REACTION, STEREOSELECTIVE REACTION, OPTICAL PURITY, ENANTIOMER...STEREOSPECIFIC REACTION, STEREOSELECTIVE REACTION, OPTICAL PURITY, ENANTIOMER...
STEREOSPECIFIC REACTION, STEREOSELECTIVE REACTION, OPTICAL PURITY, ENANTIOMER...
 
Pyrrole (o.c iv)
Pyrrole (o.c iv)Pyrrole (o.c iv)
Pyrrole (o.c iv)
 
Seminar on name reaction
Seminar on name reactionSeminar on name reaction
Seminar on name reaction
 
Conformation and configuration sujith
Conformation and configuration   sujithConformation and configuration   sujith
Conformation and configuration sujith
 
METHODS OF DETERMINATION OF CONFIGURATION OF GEOMETRICAL ISOMERS.pptx
METHODS OF DETERMINATION OF CONFIGURATION OF GEOMETRICAL ISOMERS.pptxMETHODS OF DETERMINATION OF CONFIGURATION OF GEOMETRICAL ISOMERS.pptx
METHODS OF DETERMINATION OF CONFIGURATION OF GEOMETRICAL ISOMERS.pptx
 
Structure aromaticity and Huckels rule
Structure aromaticity and Huckels ruleStructure aromaticity and Huckels rule
Structure aromaticity and Huckels rule
 
Stereoisomerism(1)
Stereoisomerism(1)Stereoisomerism(1)
Stereoisomerism(1)
 
Biphenyl derivatives & Atropisomerism
Biphenyl derivatives & AtropisomerismBiphenyl derivatives & Atropisomerism
Biphenyl derivatives & Atropisomerism
 
Asymmetric Synthesis - Christeena Shaji
Asymmetric Synthesis - Christeena ShajiAsymmetric Synthesis - Christeena Shaji
Asymmetric Synthesis - Christeena Shaji
 
Conformational analysis of n butane
Conformational analysis of n butaneConformational analysis of n butane
Conformational analysis of n butane
 
Unit 3 furan & thiophene
Unit 3 furan & thiopheneUnit 3 furan & thiophene
Unit 3 furan & thiophene
 
Heterocyclic compounds - Furan - Synthesis of furan - Characteristic reaction...
Heterocyclic compounds - Furan - Synthesis of furan - Characteristic reaction...Heterocyclic compounds - Furan - Synthesis of furan - Characteristic reaction...
Heterocyclic compounds - Furan - Synthesis of furan - Characteristic reaction...
 
Elements of symmetry (optical isomers)
Elements  of  symmetry (optical isomers)Elements  of  symmetry (optical isomers)
Elements of symmetry (optical isomers)
 
Racemic modification (2)
Racemic modification (2)Racemic modification (2)
Racemic modification (2)
 

More from Drx Mathivanan Selvam

Cellular Injury and cellular adaptations
Cellular Injury and cellular adaptationsCellular Injury and cellular adaptations
Cellular Injury and cellular adaptations
Drx Mathivanan Selvam
 
Cip rule OR SEQUENCE RULE
Cip rule OR SEQUENCE RULECip rule OR SEQUENCE RULE
Cip rule OR SEQUENCE RULE
Drx Mathivanan Selvam
 
Geometrical isomerism
Geometrical isomerismGeometrical isomerism
Geometrical isomerism
Drx Mathivanan Selvam
 
Introduction to isomerism
Introduction to isomerismIntroduction to isomerism
Introduction to isomerism
Drx Mathivanan Selvam
 
Fused heterocyclic compound indole
Fused heterocyclic compound indoleFused heterocyclic compound indole
Fused heterocyclic compound indole
Drx Mathivanan Selvam
 
Fused heterocyclic componds acridine
Fused heterocyclic componds   acridineFused heterocyclic componds   acridine
Fused heterocyclic componds acridine
Drx Mathivanan Selvam
 
Fused heterocyclic compound isoquinoline
Fused heterocyclic compound isoquinolineFused heterocyclic compound isoquinoline
Fused heterocyclic compound isoquinoline
Drx Mathivanan Selvam
 
Fused heterocyclic compounds quinoline
Fused heterocyclic compounds   quinolineFused heterocyclic compounds   quinoline
Fused heterocyclic compounds quinoline
Drx Mathivanan Selvam
 
Inhibitors of oxidative phosphorylation
Inhibitors of oxidative phosphorylationInhibitors of oxidative phosphorylation
Inhibitors of oxidative phosphorylation
Drx Mathivanan Selvam
 
Oxidative phosphorylation and its mechanism
Oxidative phosphorylation and its mechanismOxidative phosphorylation and its mechanism
Oxidative phosphorylation and its mechanism
Drx Mathivanan Selvam
 
Introduction to glycogen
Introduction to glycogenIntroduction to glycogen
Introduction to glycogen
Drx Mathivanan Selvam
 
Nomenclature of heterocyclics part ii
Nomenclature of heterocyclics part iiNomenclature of heterocyclics part ii
Nomenclature of heterocyclics part ii
Drx Mathivanan Selvam
 
Six membered heterocyclic compound pyridine
Six membered heterocyclic compound  pyridineSix membered heterocyclic compound  pyridine
Six membered heterocyclic compound pyridine
Drx Mathivanan Selvam
 
Nomenclature of heterocyclics part i
Nomenclature of heterocyclics part iNomenclature of heterocyclics part i
Nomenclature of heterocyclics part i
Drx Mathivanan Selvam
 
Heterocyclic compound thiazole
Heterocyclic compound  thiazoleHeterocyclic compound  thiazole
Heterocyclic compound thiazole
Drx Mathivanan Selvam
 
Heterocyclic compound oxazole
Heterocyclic compound   oxazoleHeterocyclic compound   oxazole
Heterocyclic compound oxazole
Drx Mathivanan Selvam
 
Designating optical isomers
Designating optical isomersDesignating optical isomers
Designating optical isomers
Drx Mathivanan Selvam
 
Conformation of cyclohexane
Conformation of cyclohexaneConformation of cyclohexane
Conformation of cyclohexane
Drx Mathivanan Selvam
 
De novo fatty acid synthesis (Palmitic acid)
De novo fatty acid synthesis (Palmitic acid)De novo fatty acid synthesis (Palmitic acid)
De novo fatty acid synthesis (Palmitic acid)
Drx Mathivanan Selvam
 
Biological oxidation of ATP synthesis - Part II
Biological oxidation of ATP synthesis - Part IIBiological oxidation of ATP synthesis - Part II
Biological oxidation of ATP synthesis - Part II
Drx Mathivanan Selvam
 

More from Drx Mathivanan Selvam (20)

Cellular Injury and cellular adaptations
Cellular Injury and cellular adaptationsCellular Injury and cellular adaptations
Cellular Injury and cellular adaptations
 
Cip rule OR SEQUENCE RULE
Cip rule OR SEQUENCE RULECip rule OR SEQUENCE RULE
Cip rule OR SEQUENCE RULE
 
Geometrical isomerism
Geometrical isomerismGeometrical isomerism
Geometrical isomerism
 
Introduction to isomerism
Introduction to isomerismIntroduction to isomerism
Introduction to isomerism
 
Fused heterocyclic compound indole
Fused heterocyclic compound indoleFused heterocyclic compound indole
Fused heterocyclic compound indole
 
Fused heterocyclic componds acridine
Fused heterocyclic componds   acridineFused heterocyclic componds   acridine
Fused heterocyclic componds acridine
 
Fused heterocyclic compound isoquinoline
Fused heterocyclic compound isoquinolineFused heterocyclic compound isoquinoline
Fused heterocyclic compound isoquinoline
 
Fused heterocyclic compounds quinoline
Fused heterocyclic compounds   quinolineFused heterocyclic compounds   quinoline
Fused heterocyclic compounds quinoline
 
Inhibitors of oxidative phosphorylation
Inhibitors of oxidative phosphorylationInhibitors of oxidative phosphorylation
Inhibitors of oxidative phosphorylation
 
Oxidative phosphorylation and its mechanism
Oxidative phosphorylation and its mechanismOxidative phosphorylation and its mechanism
Oxidative phosphorylation and its mechanism
 
Introduction to glycogen
Introduction to glycogenIntroduction to glycogen
Introduction to glycogen
 
Nomenclature of heterocyclics part ii
Nomenclature of heterocyclics part iiNomenclature of heterocyclics part ii
Nomenclature of heterocyclics part ii
 
Six membered heterocyclic compound pyridine
Six membered heterocyclic compound  pyridineSix membered heterocyclic compound  pyridine
Six membered heterocyclic compound pyridine
 
Nomenclature of heterocyclics part i
Nomenclature of heterocyclics part iNomenclature of heterocyclics part i
Nomenclature of heterocyclics part i
 
Heterocyclic compound thiazole
Heterocyclic compound  thiazoleHeterocyclic compound  thiazole
Heterocyclic compound thiazole
 
Heterocyclic compound oxazole
Heterocyclic compound   oxazoleHeterocyclic compound   oxazole
Heterocyclic compound oxazole
 
Designating optical isomers
Designating optical isomersDesignating optical isomers
Designating optical isomers
 
Conformation of cyclohexane
Conformation of cyclohexaneConformation of cyclohexane
Conformation of cyclohexane
 
De novo fatty acid synthesis (Palmitic acid)
De novo fatty acid synthesis (Palmitic acid)De novo fatty acid synthesis (Palmitic acid)
De novo fatty acid synthesis (Palmitic acid)
 
Biological oxidation of ATP synthesis - Part II
Biological oxidation of ATP synthesis - Part IIBiological oxidation of ATP synthesis - Part II
Biological oxidation of ATP synthesis - Part II
 

Recently uploaded

Alcohol_Dr. Jeenal Mistry MD Pharmacology.pdf
Alcohol_Dr. Jeenal Mistry MD Pharmacology.pdfAlcohol_Dr. Jeenal Mistry MD Pharmacology.pdf
Alcohol_Dr. Jeenal Mistry MD Pharmacology.pdf
Dr Jeenal Mistry
 
Surat @ℂall @Girls ꧁❤8527049040❤꧂@ℂall @Girls Service Vip Top Model Safe
Surat @ℂall @Girls ꧁❤8527049040❤꧂@ℂall @Girls Service Vip Top Model SafeSurat @ℂall @Girls ꧁❤8527049040❤꧂@ℂall @Girls Service Vip Top Model Safe
Surat @ℂall @Girls ꧁❤8527049040❤꧂@ℂall @Girls Service Vip Top Model Safe
Savita Shen $i11
 
Ocular injury ppt Upendra pal optometrist upums saifai etawah
Ocular injury  ppt  Upendra pal  optometrist upums saifai etawahOcular injury  ppt  Upendra pal  optometrist upums saifai etawah
Ocular injury ppt Upendra pal optometrist upums saifai etawah
pal078100
 
Report Back from SGO 2024: What’s the Latest in Cervical Cancer?
Report Back from SGO 2024: What’s the Latest in Cervical Cancer?Report Back from SGO 2024: What’s the Latest in Cervical Cancer?
Report Back from SGO 2024: What’s the Latest in Cervical Cancer?
bkling
 
BENIGN PROSTATIC HYPERPLASIA.BPH. BPHpdf
BENIGN PROSTATIC HYPERPLASIA.BPH. BPHpdfBENIGN PROSTATIC HYPERPLASIA.BPH. BPHpdf
BENIGN PROSTATIC HYPERPLASIA.BPH. BPHpdf
DR SETH JOTHAM
 
Flu Vaccine Alert in Bangalore Karnataka
Flu Vaccine Alert in Bangalore KarnatakaFlu Vaccine Alert in Bangalore Karnataka
Flu Vaccine Alert in Bangalore Karnataka
addon Scans
 
ARTIFICIAL INTELLIGENCE IN HEALTHCARE.pdf
ARTIFICIAL INTELLIGENCE IN  HEALTHCARE.pdfARTIFICIAL INTELLIGENCE IN  HEALTHCARE.pdf
ARTIFICIAL INTELLIGENCE IN HEALTHCARE.pdf
Anujkumaranit
 
The Normal Electrocardiogram - Part I of II
The Normal Electrocardiogram - Part I of IIThe Normal Electrocardiogram - Part I of II
The Normal Electrocardiogram - Part I of II
MedicoseAcademics
 
For Better Surat #ℂall #Girl Service ❤85270-49040❤ Surat #ℂall #Girls
For Better Surat #ℂall #Girl Service ❤85270-49040❤ Surat #ℂall #GirlsFor Better Surat #ℂall #Girl Service ❤85270-49040❤ Surat #ℂall #Girls
For Better Surat #ℂall #Girl Service ❤85270-49040❤ Surat #ℂall #Girls
Savita Shen $i11
 
Are There Any Natural Remedies To Treat Syphilis.pdf
Are There Any Natural Remedies To Treat Syphilis.pdfAre There Any Natural Remedies To Treat Syphilis.pdf
Are There Any Natural Remedies To Treat Syphilis.pdf
Little Cross Family Clinic
 
Ophthalmology Clinical Tests for OSCE exam
Ophthalmology Clinical Tests for OSCE examOphthalmology Clinical Tests for OSCE exam
Ophthalmology Clinical Tests for OSCE exam
KafrELShiekh University
 
Pharynx and Clinical Correlations BY Dr.Rabia Inam Gandapore.pptx
Pharynx and Clinical Correlations BY Dr.Rabia Inam Gandapore.pptxPharynx and Clinical Correlations BY Dr.Rabia Inam Gandapore.pptx
Pharynx and Clinical Correlations BY Dr.Rabia Inam Gandapore.pptx
Dr. Rabia Inam Gandapore
 
Knee anatomy and clinical tests 2024.pdf
Knee anatomy and clinical tests 2024.pdfKnee anatomy and clinical tests 2024.pdf
Knee anatomy and clinical tests 2024.pdf
vimalpl1234
 
micro teaching on communication m.sc nursing.pdf
micro teaching on communication m.sc nursing.pdfmicro teaching on communication m.sc nursing.pdf
micro teaching on communication m.sc nursing.pdf
Anurag Sharma
 
heat stroke and heat exhaustion in children
heat stroke and heat exhaustion in childrenheat stroke and heat exhaustion in children
heat stroke and heat exhaustion in children
SumeraAhmad5
 
Superficial & Deep Fascia of the NECK.pptx
Superficial & Deep Fascia of the NECK.pptxSuperficial & Deep Fascia of the NECK.pptx
Superficial & Deep Fascia of the NECK.pptx
Dr. Rabia Inam Gandapore
 
Charaka Samhita Sutra sthana Chapter 15 Upakalpaniyaadhyaya
Charaka Samhita Sutra sthana Chapter 15 UpakalpaniyaadhyayaCharaka Samhita Sutra sthana Chapter 15 Upakalpaniyaadhyaya
Charaka Samhita Sutra sthana Chapter 15 Upakalpaniyaadhyaya
Dr KHALID B.M
 
NVBDCP.pptx Nation vector borne disease control program
NVBDCP.pptx Nation vector borne disease control programNVBDCP.pptx Nation vector borne disease control program
NVBDCP.pptx Nation vector borne disease control program
Sapna Thakur
 
Tom Selleck Health: A Comprehensive Look at the Iconic Actor’s Wellness Journey
Tom Selleck Health: A Comprehensive Look at the Iconic Actor’s Wellness JourneyTom Selleck Health: A Comprehensive Look at the Iconic Actor’s Wellness Journey
Tom Selleck Health: A Comprehensive Look at the Iconic Actor’s Wellness Journey
greendigital
 
ANATOMY AND PHYSIOLOGY OF URINARY SYSTEM.pptx
ANATOMY AND PHYSIOLOGY OF URINARY SYSTEM.pptxANATOMY AND PHYSIOLOGY OF URINARY SYSTEM.pptx
ANATOMY AND PHYSIOLOGY OF URINARY SYSTEM.pptx
Swetaba Besh
 

Recently uploaded (20)

Alcohol_Dr. Jeenal Mistry MD Pharmacology.pdf
Alcohol_Dr. Jeenal Mistry MD Pharmacology.pdfAlcohol_Dr. Jeenal Mistry MD Pharmacology.pdf
Alcohol_Dr. Jeenal Mistry MD Pharmacology.pdf
 
Surat @ℂall @Girls ꧁❤8527049040❤꧂@ℂall @Girls Service Vip Top Model Safe
Surat @ℂall @Girls ꧁❤8527049040❤꧂@ℂall @Girls Service Vip Top Model SafeSurat @ℂall @Girls ꧁❤8527049040❤꧂@ℂall @Girls Service Vip Top Model Safe
Surat @ℂall @Girls ꧁❤8527049040❤꧂@ℂall @Girls Service Vip Top Model Safe
 
Ocular injury ppt Upendra pal optometrist upums saifai etawah
Ocular injury  ppt  Upendra pal  optometrist upums saifai etawahOcular injury  ppt  Upendra pal  optometrist upums saifai etawah
Ocular injury ppt Upendra pal optometrist upums saifai etawah
 
Report Back from SGO 2024: What’s the Latest in Cervical Cancer?
Report Back from SGO 2024: What’s the Latest in Cervical Cancer?Report Back from SGO 2024: What’s the Latest in Cervical Cancer?
Report Back from SGO 2024: What’s the Latest in Cervical Cancer?
 
BENIGN PROSTATIC HYPERPLASIA.BPH. BPHpdf
BENIGN PROSTATIC HYPERPLASIA.BPH. BPHpdfBENIGN PROSTATIC HYPERPLASIA.BPH. BPHpdf
BENIGN PROSTATIC HYPERPLASIA.BPH. BPHpdf
 
Flu Vaccine Alert in Bangalore Karnataka
Flu Vaccine Alert in Bangalore KarnatakaFlu Vaccine Alert in Bangalore Karnataka
Flu Vaccine Alert in Bangalore Karnataka
 
ARTIFICIAL INTELLIGENCE IN HEALTHCARE.pdf
ARTIFICIAL INTELLIGENCE IN  HEALTHCARE.pdfARTIFICIAL INTELLIGENCE IN  HEALTHCARE.pdf
ARTIFICIAL INTELLIGENCE IN HEALTHCARE.pdf
 
The Normal Electrocardiogram - Part I of II
The Normal Electrocardiogram - Part I of IIThe Normal Electrocardiogram - Part I of II
The Normal Electrocardiogram - Part I of II
 
For Better Surat #ℂall #Girl Service ❤85270-49040❤ Surat #ℂall #Girls
For Better Surat #ℂall #Girl Service ❤85270-49040❤ Surat #ℂall #GirlsFor Better Surat #ℂall #Girl Service ❤85270-49040❤ Surat #ℂall #Girls
For Better Surat #ℂall #Girl Service ❤85270-49040❤ Surat #ℂall #Girls
 
Are There Any Natural Remedies To Treat Syphilis.pdf
Are There Any Natural Remedies To Treat Syphilis.pdfAre There Any Natural Remedies To Treat Syphilis.pdf
Are There Any Natural Remedies To Treat Syphilis.pdf
 
Ophthalmology Clinical Tests for OSCE exam
Ophthalmology Clinical Tests for OSCE examOphthalmology Clinical Tests for OSCE exam
Ophthalmology Clinical Tests for OSCE exam
 
Pharynx and Clinical Correlations BY Dr.Rabia Inam Gandapore.pptx
Pharynx and Clinical Correlations BY Dr.Rabia Inam Gandapore.pptxPharynx and Clinical Correlations BY Dr.Rabia Inam Gandapore.pptx
Pharynx and Clinical Correlations BY Dr.Rabia Inam Gandapore.pptx
 
Knee anatomy and clinical tests 2024.pdf
Knee anatomy and clinical tests 2024.pdfKnee anatomy and clinical tests 2024.pdf
Knee anatomy and clinical tests 2024.pdf
 
micro teaching on communication m.sc nursing.pdf
micro teaching on communication m.sc nursing.pdfmicro teaching on communication m.sc nursing.pdf
micro teaching on communication m.sc nursing.pdf
 
heat stroke and heat exhaustion in children
heat stroke and heat exhaustion in childrenheat stroke and heat exhaustion in children
heat stroke and heat exhaustion in children
 
Superficial & Deep Fascia of the NECK.pptx
Superficial & Deep Fascia of the NECK.pptxSuperficial & Deep Fascia of the NECK.pptx
Superficial & Deep Fascia of the NECK.pptx
 
Charaka Samhita Sutra sthana Chapter 15 Upakalpaniyaadhyaya
Charaka Samhita Sutra sthana Chapter 15 UpakalpaniyaadhyayaCharaka Samhita Sutra sthana Chapter 15 Upakalpaniyaadhyaya
Charaka Samhita Sutra sthana Chapter 15 Upakalpaniyaadhyaya
 
NVBDCP.pptx Nation vector borne disease control program
NVBDCP.pptx Nation vector borne disease control programNVBDCP.pptx Nation vector borne disease control program
NVBDCP.pptx Nation vector borne disease control program
 
Tom Selleck Health: A Comprehensive Look at the Iconic Actor’s Wellness Journey
Tom Selleck Health: A Comprehensive Look at the Iconic Actor’s Wellness JourneyTom Selleck Health: A Comprehensive Look at the Iconic Actor’s Wellness Journey
Tom Selleck Health: A Comprehensive Look at the Iconic Actor’s Wellness Journey
 
ANATOMY AND PHYSIOLOGY OF URINARY SYSTEM.pptx
ANATOMY AND PHYSIOLOGY OF URINARY SYSTEM.pptxANATOMY AND PHYSIOLOGY OF URINARY SYSTEM.pptx
ANATOMY AND PHYSIOLOGY OF URINARY SYSTEM.pptx
 

Conformation of ethane and n butane

  • 1.
  • 3. Conformation of Ethane • When an ethane molecule rotates about it's carbon- carbon single bond two extreme conformations can be result, the staggered and eclipsed conformation. • Here we will use Newman projection to discuss the confirmation. H H H H H H H H H HH H 60° 0° Staggered Eclipsed
  • 4. Rotation around bond • If one of the methyl group is allowed to rotate keeping the rest of molecule undisturbed and number of possible arrangement can be obtained.
  • 5. 60° 120° 360° 300° 240° 180° H HH H H H HH H H H H H H H HH H H H H H H H H H HH H H H H H H H H H H H H H H (I)- Eclipsed Repulsion more Energy more Less stable (II) - Staggered Repulsion less Energy less More stable (III)-Eclipsed Repulsion more Energy more Less stable (VI)-Staggered Repulsion less Energy less More stable (V)-Eclipsed Repulsion more Energy more Less stable (VII)-Eclipsed Repulsion more Energy more Less stable (IV)-Staggered Repulsion less Energy less More stable
  • 6. Energy level • By doing so six possible confirmation can be obtained out of which 3 are staggered (II,IV,VI) and 3 are eclipsed form (I/VII,III,V). • Potential energy of I,III,V,VII is greater than that of II,IV,VI due to repulsive forces. • Stability of II,IV,VI is greater than that of I,III,V,VII. I , III, V, VII > II , IV , VI II, IV, VI > I , III , V , VII
  • 8. n-Butane CH3-CH2-CH3 C – C – C – C H H HH HH H H H H 1 432 Kekule structure Skeletal structure condensed structure
  • 9. Possible rotation for n-Butane C – C – CH2-CH3 H HH HH 1 2 H3C – C – C – CH3 HH H H 32 Rotation around C1 and C2 Rotation around C2 and C3 Structure I Structure II *
  • 10. Conformations of n-Butane • Butane has three carbon-carbon single bond and molecule can rotate about each of them . • If the rotation will be about C2 and C3 bond then confirmation will be symmetrical. • Different conformation of butane can be obtained by rotating about its middle carbon- carbon single bond.
  • 11. 60° 120° 360° 300° 240° 180° H3C H3CH3C H3C CH3 CH3 CH3CH3 CH3 H3C CH3 CH3 H3C CH3 H HH H H H H H H H H H HH H H H H H H H H H H H H H H (I)-Fully Eclipsed Very high Repulsion Very high Energy Least stable (II) – Staggered(Gauche) Moderate Repulsion Moderate Energy Moderately stable (III)-Partly Eclipsed Repulsion high Energy high Less stable (IV)-Staggered (Anti) Repulsion less Energy less More stable (VII)-Fully Eclipsed Very high Repulsion Very high Energy Least stable (VI) – Staggered(Gauche) Moderate Repulsion Moderate Energy Moderately stable (V)-Partly Eclipsed Repulsion high Energy high Less stable
  • 12. Conformers of n-Butane • Butane has 3 staggered (II,IV,VI) conformer. • IV (Anti conformer), in which the two methyl group are as far apart as possible is more stable and require very less energy. • II , VI (Gauche conformer) • Butane has 3 eclipsed (I/VII,III,V) • I and VII are fully eclipsed • III and V are Partly eclipsed
  • 13. Energy level • Potential energy of I,VII is greater followed by III,V and II,VI. Conformer IV require very less energy because bulky group CH3 is far apart. • Stability of IV is greater than that of II,VI followed by III, V and I,VII. I ,VII > III, V > II, VI > IV IV > II, VI > III, V > I, VII
  • 15. Conformation for n-Butane C – C – CH2-CH3 H HH HH 1 2 Structure I
  • 16. 60° 120° 360° 300° 240° 180° H3C H3C H3C CH2-CH3 CH3 CH3 CH3 H3C-H2C CH3 H HH H H H H H H H H H HH H H H H H H H H H H H H H H CH2-CH3CH2-CH3 CH2-CH3 H3C-H2C H3C-H2C (I)- Eclipsed Repulsion more Energy more Less stable (II) - Staggered Repulsion less Energy less More stable (III)-Eclipsed Repulsion more Energy more Less stable (IV)-Staggered Repulsion less Energy less More stable (VI)-Staggered Repulsion less Energy less More stable (V)-Eclipsed Repulsion more Energy more Less stable (VII)-Eclipsed Repulsion more Energy more Less stable
  • 17. Energy level • By doing so six possible confirmation can be obtained out of which 3 are staggered (II,IV,VI) and 3 are eclipsed form (I/VII,III,V). • Potential energy of I,III,V,VII is greater than that of II,IV,VI due to repulsive forces. • Stability of II,IV,VI is greater than that of I,III,V,VII. I , III, V, VII > II , IV , VI II, IV, VI > I , III , V , VII
  • 18. Thank you my dear students...!!!