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Number of complexes which will exhibit synergic bonding amongst, Cr CO 6 , Mn CO 5 and Mn 2 CO 10 is

Correct answer

3

Step-by-step solution

Synergic bonding involves transference of electrons from ligands to metal. The transference of electrons takes place from filled metal orbitals to anti-bonding orbitals of ligands. It is a bond between a carbonyl group acting as a ligand and a metal. Synergic bonding means self strengthening bond. More the number of d electrons on the central metal ion more the synergic bonding. In metal carbonyls' oxidation state of the metal is zero. In the complex Mn CO 5 , the electronic configuration of Mn is 3 d 5 4 s 2 .

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