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The spin only magnetic moment value (in ...

The spin only magnetic moment value (in Bohr magneton units) of `Cr(CO)_(6)` is

A

0

B

2.84

C

4.9

D

5.92

Text Solution

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The correct Answer is:
A
Chromium in `Cr(CO)_(6)` is in zero oxidation state and has `[Ar]^(18)3d^(5)4s^(1)` as the electronic configuration. However, CO is a strong ligand, hence pairing up of electrons takes place leading to following configuration in `Cr(CO)_(6)`.

Since the complex has o unpaired electron, its magnetic moment is zero.
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