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Grade: 11

                        

what is hyperconjugation effect? how it explain the stability of alkenes

9 years ago

Answers : (7)

Durgesh Prasher
21 Points
							

1242_25758_double bond.jpeg

9 years ago
vikas askiitian expert
509 Points
							

When atoms / groups having lone pair of electrons are bonded by a single bond to the conjugated system, they displace electrons towards multiple bonds.

illustration of hyperconjugation with single bond
  • When electronegative atoms or group of atoms bond themselves to the conjugated systems by multiple bonding they pull electrons from the multiple bond.
  • illustration of hyperconjugation with multiple bond

This conjugation between electrons of single (H-C) bond with multiple bonds is called hyperconjugation. This occurs when the sigma (s) electrons of the H-C bond that is attached to an unsaturated system, such as double bond or a benzene ring, enter into conjugation with the unsaturated system.


Stability order of alkenes


9 years ago
Sushmita
11 Points
							If sigma electrons containing acidic H are present at alternate position with πelectron system, then sigma electrons enter into conjugation with π electron system
						
3 years ago
pragati dound
21 Points
							Hyperconjugation means transfer of the sigma electron which are there in between C-H bond to the next carbon which is attached to alfa carbonMore the  number of alfa hydrogenAnd then more the number of hyperconjugation structure which leads to stability.
						
3 years ago
Ram kumar
11 Points
							In a system having double, triple, bonds the ¶(sigma bond) is least contributing to the stability of compound since it is not fulfilling the basic cond. of resonance therefore ¶ bond b/w (C-H) is considered as evil and is pressurized by other bonds hence H of -(CH) is sent outside but within the electrostatic range of C ( * bond b/w C-H is not broken since b.e greater than reso_ energy that will lead to instability.) So( -)ve  charge comes on C atom which shares it to pure p orbital of other C atom )and makes π bond , now all members of compound are happy & shows max stabily leading to Hyper conjugation . H atom which goes outside is called alpha H more the no of H atoms which goes outside more is hyperconjugation.
						
2 years ago
Shohan Ahmed
13 Points
							In hyperconguhative effect first need a double bond between c atom (c=c). Besides * carbon called alpha carbon who realise a hydrogen ion than the election made a double bond between alpha and * carbon .And than the other double bond election go through the beside the * carbon hade.
						
2 years ago
Anshika
15 Points
							
Hyperconjuation is the interaction of the electron in a sigma orbital with an adjacent empty non bonding orbital,antibondingsigma or pie orbital,to give an extended molecular orbital. Increased electron delocalization associated with hyperconjuation increases the stability of the system 
2 years ago
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