Coordination CompoundHardBloom L3

Question

In the isoelectronic series of metal carbonyl, the C–O bond strength is expected to increase in the order.

Options

A.[Mn(CO)6]+ < [Cr(CO)6] < [V(CO)6]–
B.[V(CO)6]– < [Cr(CO)6] < [Mn(CO)6]+
C.[V(CO)6]– < [Mn(CO)6]+ < [Cr(CO)6]
D.[Cr(CO)6] < [Mn(CO)6]+ < [V(CO)6]–

Solution

Sol. [V(CO)6]– < [Cr(CO)6] < [Mn(CO)6]+

Negative charge an metal increases the synergic bonding.

Hence C–O bond strength decreases.

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