The correct statements about metal carbonyls are
A. The metal-carbon bonds in metal carbonyls possess both $\sigma$ and $\pi$ character.
B. Due to synergic bonding interactions between metal and CO ligand, the metal-carbon bond becomes weak.
C. The metal-carbon $\sigma$ bond is formed by the donation of lone pair of electrons on the carbonyl carbon into a vacant orbital of metal.
D. The metal-carbon $\pi$ bond is formed by the donation of electrons from filled d-orbital of metal into vacant $\pi^*$ orbital of CO .
Choose the correct answer from the options given below:
Select the correct option:
A
A and B Only
B
A, C and D Only
C
B and C Only
D
A and D Only
✓ Correct! Well done.
✗ Incorrect. Try again or view the solution.
Solution
(A) The metal-carbon bonds in metal carbonyls possess both $\sigma$ and $\pi$-character.
(B) The metal to ligand bonding creates a synergic effect which strengthens the bond between CO and the metal i.e. metal carbon bond becomes strong.
(C) The metal-carbon $\sigma$ is formed by the donation of lone pair of electrons on the carbonyl carbon into a vacant orbital of metal.
(D) The metal-carbon $\pi$ bond is formed by the donation of electrons from filled d-orbital of metal into vacant $\pi^*$ orbital of CO.
Correct answer is A,C,D.
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