Organic Reaction Mechanism Chemistry XI JEE Neet Chemistry Its A Ppt For Wasy Understanding For the Topic For Engineering and Medical Aspirants

1. Mechanism of Organic
Reactions
Prepared By :-
Hemant Sharma
(Dept. of Chemistry) Parishkar
International College

2. • Basic Introduction About Bonding
• Overlapping of Orbitals
• Introduction to Organic Reactions
• Types of Reagents
• Types of Organic Reactions
Contents

3. Chemical Bond :- The Force that hold atoms together in a molecule are called Chemical Bonds.
Basic Introduction About Bonding

4. Atomic Orbital :- The Region in space where an electron is likely to be found is
called an orbital.
Bonds Are Formed by Overlapping of Atomic Orbitals.
Overlapping of Atomic Orbitals are of 2 Types
• Sigma Bond
• Pi - Bond
Sigma Bond is Formed By :-
• s-s Overlap
• s-p Overlap
• p-p Head on Overlap
Pi Bond is Formed By :-
• p-p Sidewise Overlapping

5. Sigma Bond
Pi Bond

6. Introduction To Organic Reactions
Mostly In Case Of Organic Reaction , Covalent bond is Present.
Organic reactions are chemical reactions involving organic compounds.
Generally In Organic Reactions , Covalent Bonds are broken and New Bonds are Formed.
A Reaction Mechanism is the step by step sequence of elementary reactions
by which overall chemical change occurs.

7. Reagent + Substrate  Product
Organic
Reactions
Types of Reagents Electrophile
Nucleophile
Free Radical

10. Free Radical

12. Addition Reactions
In these type of Reactions one π Bond is broken & two Sigma Bonds are formed. One Part
of the attacking Reagent gets attached to one atom or group of the substituent and another
part of the attacking reagent gets attached to the second atom or group of the substrate.
.

13. Addition Reaction
1. Nucleophilic
Addition
2. Electrophilic
Addition
3. Free Radical
Addition

14. Nucleophilic Addition Reaction
Electrophilic Addition Reaction

15. Free Radical Addition Reaction
Mechanism

16. Overall Reaction

17. Substitution Reaction
The reactions in which an atom or group of atoms in a molecule is replaced or
substituted by different atoms or group of atoms are called Substitution Reaction.

18. Substitution Reaction
2. Electrophilic
Substitution
1. Nucleophilic
Substitution
3. Free Radical
Substitution

19. Nucleophilic Substitution Reaction
Nucleophilic Substitution
SN1
SN2

22. Electrophilic Substitution Reaction
 Electrophilic substitution reactions are chemical reactions in which an electrophile
displaces a functional group in a compound, which is typically, but not always, a
hydrogen atom.
 Electrophilic aromatic substitution reactions are characteristic of aromatic compounds,
and are important ways of introducing functional groups onto benzene rings.

23. Free Radical Substitution Reaction
In organic chemistry, a radical-substitution reaction is a substitution reaction involving free
Radicals as a Reactive Intermediate.

24. Elimination Reaction

25. Rearrangement Reaction