Question

calculate number of sigma and pi bonds in the 2,8-dimethyl -3,6-decadiens ,1,3,5,7 octatetraene , 2 -n-propylpent -1-ene , 4-ethyl-2,6-dimethyl -dec-4-ene.

Answer 1

a. 2,8-dimethyl-3,6-decadiene

sigma bond = 30 pi bond = 2

b. 1,3,5,7-octatetraene

Sigma = 16 pi = 4

c. 2-npropyl pent -1-ene

Sigma =22 pi =1

d. 4-ethyl -2,6-dimethyl –dec-4-ene

Sigma = 41 pi= 1