Select the correct order of C - O bond length in the following molecules I. `[Mo(CO)_3 (PF_3)_3]` II. `[Mo(CO)_3 (PCl_3)_3]` III. `[Mo(CO)_3(P (Me)_3)_3]`
A
`I gt II gt III`
B
`III gt I gt II`
C
`II gt III gt I`
D
`I lt II lt III`
Text Solution
Verified by Experts
The correct Answer is:
D
`C - O` bond length `prop 1/("CO bond order")` In teh presence of `PF_3` bond oreder of CO will be maximum due to better - acceptro tendency of `PF_3` in comparison of `PCl_3` or `Pme_3`.
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