Which is more important in each pair of contributing resonance structures?
A)II,IV,V
B)II,III,V
C)II,III,VI
D)I,IV,V

Question

Which is more important in each pair of contributing resonance structures? 
A)II,IV,V 
B)II,III,V 
C)II,III,VI 
D)I,IV,V

Quizplus · Accepted Answer

In each pair, the most important contributing resonance structure is the one that has the most atoms with full octets (except for hydrogen) and the least formal charges. In choice B, both II and V have full octets and no formal charges, making them the most important. In III, the central nitrogen has only six electrons, violating the octet rule, while in IV and VI, there are more formal charges compared to II and V. In choice A, IV and V have more formal charges compared to II. In choice C, III has fewer full octets compared to II and VI. In choice D, IV has more formal charges compared to I and V.

Which Is More Important in Each Pair of Contributing Resonance