Three nonequivalent Lewis structures are proposed for SO (a neutral molecule with 18…
CHEMISTRY · Single correct · AP · Chemistry · Compound Structure and Properties · Compound Structure and Properties
Problem
Three nonequivalent Lewis structures are proposed for SO2 (a neutral molecule with 18 valence electrons).
I. O=S=O (both S–O bonds are double).
II. −O–S≡O+ (left S–O single, right S–O triple).
III. −O–S=O (one S–O single, one S–O double; sulfur carries +1 formal charge).
Which structure is predicted to contribute most to the resonance hybrid?
(a) II only
(b) I and III contribute equally
(c) I only
(d) III only