Question

Which of the following system is most stable for a chelate?

• A. $\text{Two fused cyclic system}$
• B. $\text{Three fused cyclic system}$
• C. $\text{Four fused cyclic system}$
• D. $\text{Five fused cyclic system}$

Answer 1

The correct option is D $\text{Five fused cyclic system}$

Chelate compounds are more stable than non-chelate compounds, as in chelate compounds movement of electrons are within ring.

And stability of Chelate compounds depends on the ring size, more is the size of ring more is the stability of compounds.

So out of these Five fused cyclic system are more stable.

Order of stability are as follows:

$5\ fused\ cyclic\ system<4\ fused\ cyclic\ system<3\ fused\ cyclic\ system<2\ fused\ cyclic\ system$