Coordination Compounds 2 Question 13
14. $Mn _2(CO) _{10}$ is an organometallic compound due to the presence of
(2019 Main, 12 Jan I)
(a) $Mn -$ Cbond
(b) $Mn-O$ bond
(c) $C-O$ bond
(d) $Mn-Mn$
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Answer:
Correct Answer: 14. (a)
Solution:
- $Mn _2(CO) _{10}$ is an organometallic compound due to the presence of $Mn-C$ bond. The metal-carbon bond in organometallic compounds possess both $\sigma$ and $-\pi$ character. The $M-C$ $ \sigma$ bond is formed by the donation of lone pair of electrons from the carbonyl carbon into a vacant orbital of the metal. The $M-C$ $ \pi$-bond is formed by the donation of pair of electrons from a filled $d$-orbital of metal into vacant antibonding $\pi^{*}$ orbital of $CO$. The $M-L$ bonding creates a synergic effect which strengthens the bond between $CO$ and the metal.
The structure of $Mn _2(CO) _{10}$ is shown below :
BETA
