Question

$H_2\ddot{C}-N\equiv N:$ $H_{2}C=N=\ddot{N}:$ $H_{2}C-\ddot{N}=\ddot{N}:$

(A) (B) (C)

Consider structural formulas A,B and C:

(A) Are A,B and C constitutional isomers, or are they resonance forms?
(B) Which structures have a negatively charged carbon?
(C) Which structures have a positively charged carbon?
(D) Which structures have a positively charged nitrogen?
(E) Which structures have a negatively charged nitrogen?
(F) What is the net charge on each structure?
(G) Which is a more stable structure, A or B and why?
(H) Which is a more stable structure, B or C and why?

Answer 1

A) They are resonance forms

B) structure A,

C) structure C,

D) structure A,

E) structure C,

F) zero

G) B is more stable because it is neutral

H) B is more stable because it is neutral.