Assertion :The $d_{c - o}$ in bridging carbonyl group is longer than that of terminal carbonyl group. Reason: With an increase in the extent of synergic bonding, the $C - O$ bond length increases.

Read the above assertion and reason and choose the correct option regarding it.

Statement-1 is true, statement-2 is true and statement-2 is correct explanation for statement-1.

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Statement-1 is true, statement-2 is true and statement-2 is NOT the correct explanation for statement-1

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Statement-1 is true, statement-2 is false.

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Statement-1 is false, statement-2 is true.

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Solution

The correct option is A Statement-1 is true, statement-2 is true and statement-2 is correct explanation for statement-1.
The $d_{c - o}$ in bridging carbonyl group is longer than that of terminal carbonyl group.because of With increase in extent of synergic bonding, the C---O bond length increases.
In bridging carbonyl group, extent of MCO bonding increases due to involvement of two metals for one CO group.
Hence option A is correct.

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