Question

Which of the following statement describes correctly the bonding in ${\mathrm{Mn}}_2{\left(\mathrm{CO}\right)}_{10}$?

• A. It has some $\mathrm{CO}$ as bridging ligands
• B. EAN is $35$
• C. Mn-Mn bond is present in this molecule
• D. Each Mn atom is sp³ hybridized

Answer 1

The correct option is C

Mn-Mn bond is present in this molecule

Explanation for the correct options

(C) $\mathrm{Mn}-\mathrm{Mn}$ bond is present in this molecule

• ${\mathrm{Mn}}_2{\left(\mathrm{CO}\right)}_{10}$ contains two axially linked ${\left(\mathrm{CO}\right)}_5\mathrm{Mn}$ subunits.
• There are two kinds of $\mathrm{CO}$ ligands.
• There are four “equatorial” carbonyls bonded to each $\mathrm{Mn}$ atom that is nearly perpendicular to the $\mathrm{Mn}-\mathrm{Mn}$ bond.

Explanation for the incorrect options

(A) It has some $\mathrm{CO}$ as bridging ligands

• ${\mathrm{Mn}}_2{\left(\mathrm{CO}\right)}_{10}$ has no bridging $\mathrm{CO}$ ligands.

(B) EAN is $35$

• EAN of each $\mathrm{Mn}$ atom is $36$.

(D) Each $\mathrm{Mn}$ atom is sp³ hybridized

• In ${\mathrm{Mn}}_2{\left(\mathrm{CO}\right)}_{10}$, each $\mathrm{Mn}$ atom is d²sp³ hybridized.

Hence, Option (C) is correct., the $\mathrm{Mn}-\mathrm{Mn}$ bond is present in ${\mathrm{Mn}}_2{\left(\mathrm{CO}\right)}_{10}$ molecule.