Question

Which of the following is not expected to be resonance
structure ?
_ +
(a) :CH₂ –N = O:
| . .
CH₃
_
+ . .
(b) CH₂ =N – O:
| . .
CH₃
_
+ . .
(c) CH₂ =N – O:
| . .
CH₃
(d) CH₂ =N = O
|
CH₃

Answer 1

Which of the following is not expected to be resonance

structure ?

_ +

(a) :CH₂ –N = O:

| . .

CH₃

_

+ . .

(b) CH₂ =N – O:

| . .

CH₃

_

+ . .

(c) CH₂ =N – O:

| . .

CH₃

(d) CH₂ =N = O

|

CH₃

Answer 2

Among the following the one which is not a resonating structure is

d) CH₂ =N = O

|

CH₃

• Resonating structure: They are a set of two or more Lewis Structures that  describes the electronic bonding  in a single polyatomic species, which also includes fractional bonds and fractional charges.
• When we go through all the options we can see each and every atom is shown its formal charge, its octet structure, its fractional bonds in a) ,b), c)
• But in option d) ,we cant see the fractional charges on N and O atoms properly.
• So, option d) cannot be a resonating structure.