Question

Assertion :Statement $-$ 1 : Organometallic compounds are those which have one or more metal $-$ carbon bonds. Reason: Statement $-$ 2 : Metallic carbonyls are organometallic compounds having both $\sigma$ and $\pi -$ bonds.

• A. Statement $-$ 1 is true, Statement $-$ 2 is true and Statement $-$ 2 is correct explanation for Statement $-$ 1.
• B. Statement $-$ 1 is true, Statement $-$ 2 is true and Statement $-$ 2 is NOT the correct explanation for Statement $-$ 1.
• C. Statement $-$ 1 is true, Statement $-$ 2 is false.
• D. Statement $-$ 1 is false, Statement $-$ 2 is true.

Answer 1

The correct option is B Statement $-$ 1 is true, Statement $-$ 2 is true and Statement $-$ 2 is NOT the correct explanation for Statement $-$ 1.

Organometallic compounds are those which have one or more metal carbon bonds. For example metal carbonyls $\left(Fe\right(CO{)}_5)$ contains bond between central metal (Fe) and C atom of carbonyl ligand.
Metallic carbonyls are organometallic compounds having both and bonds. C donates its electron density to the metal atom to form sigma bond whereas metal back donates the electron density to form pi bond.
Thus, Statement 1 is true, Statement 2 is true and Statement 2 is NOT the correct explanation for Statement 1.