Question

which one is more stable give reason for your answer​

Answer 1

the second structure is resonating structure of the first one....

so here we have to compare two resonating structures...

there are some rules for comparison of resonating structures:-

1) neutral species are more sta stable than charged species

2) complete octet is stable then incomplete octet

3) structure with more number of covalent bond are stable

4) negative charge on more electronegative atom is stable and vice versa

In this question we can't apply the first rule because both the structures are are charged so

so we can now go for second rule if you check carefully you can see

the octet of carbon in the second structure is incomplete

but the octet of of carbon as well as oxygen are complete in first structure so the first structure is more stable than the second structure

so the second structure is unstable.

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