Question

How hyperconjugation explains stability of 2-butene than 1-butene?

Answer 1

HYPERCONJUGATION :
it was first proposed by R.S.mulliken in 1939.
Hyper means intense so hyper conjugation is intense type of conjugation.
Hyper conjugation is the delocalization of sigma electrons in a system.
it os the overlapping of sigma orbital with adjacent p orbital on the atom
when sigma electroms are conjugated with p orbitals having positive charge it is called hyper conjugation.
RULES: it will obey
AROMATICITY
CONJUGATION
IT WII BE PLANER AND CYCLIC
OBEY HUCKLE RULE(4n+2)

STABILITY:
1 )it depends upon covalent bond , more covalent bond more will compound stable.
2)the stability of various alkene can be determined and compared from the study of thier heat of combustion
3)1 butene is highest heat of combustion and the least stable of butene.
4)more alkyle group attach to double bonded carbon atom greater will be stability