Question: The sum of sigma ($\sigma$) and pl($\pi$) bonds In Hex-1, 3-dlen-5-yne Is ________....

Question

The sum of sigma ( $\sigma$ ) and pl( $\pi$ ) bonds In Hex-1, 3-dlen-5-yne Is ________.

Answer 1

Solution

The structure of Hex-1,3-dien-5-yne is $CH_2=CH-CH=CH-C \equiv CH$ . There are 11 sigma bonds (all single bonds, and one bond from each double and triple bond). There are 4 pi bonds (one from each double bond and two from the triple bond). The sum is $11 + 4 = 15$ .