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Enantiomers
Enantiomers
Glyceraldehydes are not supper
impossible on its mirror image has chiral
center and therefore exist as two
dif...
R/S rotation


The right hand left hand nomenclature is
used to name the enantiomers of chiral
compounds. The sterocenter...
Chirality


In compounds in which an atom that is
connected to 4 different substituent groups.
This atom is called a-symm...
Optical Activity
The interaction with light is called optical
activity and enantiomers are often called
optical isomers.
...
Block diagram
Anti-clock
wise
rotation
(-)(l)

When plane
polarized light

Fall sample
of
enantiomers

Rotate the
light

C...
Racemic Mixture


It is a mixture of equal amount of (+)
and (-) enantiomers of chiral
compounds.



It shows no net rot...
Racemization


When one enantiomers equilibrates with
its mirror image the process is called is
recemization.

50% +

50%...
Representation:
•“andiron” or “sawhorse ”

Newman projections:
Fisher Projection
It is a formula which represent tetrahedral
carbon atom and their substituent's in two
dimensions. The m...
Conti……


Fisher projection tell us the absolute
configuration then we get R and S
enantiomers.
Resolution
Pure enantiomers can be synthesizing
racemic mixture and then separating the
enantiomers Formed by a process
ca...
Enantiomers
Enantiomers
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Enantiomers

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Enantiomers

  1. 1. Enantiomers
  2. 2. Enantiomers Glyceraldehydes are not supper impossible on its mirror image has chiral center and therefore exist as two different enantiomers with opposite optical rotation.
  3. 3. R/S rotation  The right hand left hand nomenclature is used to name the enantiomers of chiral compounds. The sterocenters are labeled as R or S. R- Glyceraldehyde S-Glyceraldehyde
  4. 4. Chirality  In compounds in which an atom that is connected to 4 different substituent groups. This atom is called a-symmetric atom or a stereo center. Those compounds are called chiral compounds. Chiral Center
  5. 5. Optical Activity The interaction with light is called optical activity and enantiomers are often called optical isomers.  Optical rotation is measured with the polarimeter. 
  6. 6. Block diagram Anti-clock wise rotation (-)(l) When plane polarized light Fall sample of enantiomers Rotate the light Clockwise dextrorotatry (+)(d)
  7. 7. Racemic Mixture  It is a mixture of equal amount of (+) and (-) enantiomers of chiral compounds.  It shows no net rotation of plane polarized light.
  8. 8. Racemization  When one enantiomers equilibrates with its mirror image the process is called is recemization. 50% + 50%-
  9. 9. Representation: •“andiron” or “sawhorse ” Newman projections:
  10. 10. Fisher Projection It is a formula which represent tetrahedral carbon atom and their substituent's in two dimensions. The molecule is drawn in the form of cross.  The tetrahedral carbon is the plane of the paper at the center of cross.  Atoms connected to the tetrahedral carbon by horizontal bonds are behind the plane of the paper.  Atoms connected to the tetrahedral carbon by vertical bonds in front of the plane of the paper. 
  11. 11. Conti……  Fisher projection tell us the absolute configuration then we get R and S enantiomers.
  12. 12. Resolution Pure enantiomers can be synthesizing racemic mixture and then separating the enantiomers Formed by a process called resolution.  Glyceraldehydes are separated by chemical method in compound COOH must be present in compound does not contain COOH acid. first it changed into carboxylic acid then react with L-brucine. 

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