Question

Which of the following is an organometallic compound ?

• A. CH₃COONa
• B. CH₃CH₂MgBr
• C. (CH₃COO)₂Ca
• D. CH₃ONa

Answer 1

The Correct Option is B

An organometallic compound is a compound that contains a bond between a carbon atom of an organic molecule and a metal (usually a transition metal or main group metal).

Let's review the options:

• Option 1: CH₃COONa - This is sodium acetate, which is an ionic compound and does not contain a carbon-metal bond. Hence, this is not an organometallic compound.
• Option 2: CH₃CH₂MgBr - This is ethylmagnesium bromide, an organometallic compound. It contains a carbon-magnesium bond (C-Mg), which is a characteristic feature of organometallic compounds. Therefore, this is the correct answer.
• Option 3: (CH₃COO)₂Ca - This is calcium acetate, which is an ionic compound and does not have a carbon-metal bond. Therefore, this is not an organometallic compound.
• Option 4: CH₃ONa - This is sodium methoxide, an ionic compound that does not contain a carbon-metal bond. Hence, this is not an organometallic compound.

Conclusion: The correct answer is Option 2: CH₃CH₂MgBr, as it is an organometallic compound due to the carbon-magnesium bond.

Answer 2

An organometallic compound contains at least one bond between a carbon atom and a metal atom.

- \(\text{CH}_3\text{COONa}\) is a sodium salt of acetic acid, which is not an organometallic compound.
- \(\text{CH}_3\text{CH}_2\text{MgBr}\) is a Grignard reagent, which is a classic example of an organometallic compound. It contains a bond between carbon and magnesium.
- \((\text{CH}_3\text{COO})_2\text{Ca}\) is calcium acetate, which is not an organometallic compound.
- \(\text{CH}_3\text{ONa}\) is sodium methoxide, which is not an organometallic compound as it doesn't contain a metal-carbon bond.

Thus, the correct answer is \(\text{CH}_3\text{CH}_2\text{MgBr}\).