The enolic form of acetone contains

Options

A. 9 sigma bonds, 1 pi bond and 2 lone pairs
B. 8 sigma bonds, 2 pi bond and 2 lone pairs
C. 10 sigma bonds, 1 pi bond and 1 lone pairs
D. 9 sigma bonds, 2 pi bonds and 1 lone pair

Answer

A

Explanation

Enolic form of acetone is
`underset("Enolic form")(CH_(2)=overset(OH)overset(|)(C)-CH_(3)) " " underset("Keto form")(CH_(3)-overset(O)overset(||)(C)-CH_(3))`
`H underset(sigma)-overset(H)overset(|sigma)(C)underset(pi)overset(sigma)=overset(overset(..sigma)( :O-H))overset(|sigma)(Cunderset(sigma)-)underset(H)underset(|sigma)overset(H)overset(|sigma)(C)overset(sigma)-H`, Hence, `sigma` -bonds = 9, `pi` -bonds = 1, lone pair =2