Question

why the number of bonds in toluene (C7H8) is 3 pi bonds and 15 sigma bonds ?
why not 3 pi bonds and 9 sigma bonds??

Answer 1

Answer:

Toluene is C6H6(CH3)

so sigma bonds are

6 C-C bond

5 C-H bond in benzene ring

3 C-H bond in CH3

1 C-C bond connecting C6H5 and CH3 ie benzene and methyl groups

so total 6+5+3+1 =15