Question

Identify the reaction in which diborane is produced on an industrial scale:

• A. Reaction of \( BF_3 \) with \( LiAlH_4 \) in diethyl ether
• B. Oxidation of \( NaBH_4 \) with \( I_2 \)
• C. Reaction of \( BF_3 \) with \( NaH \) at 450 K
• D. By heating \( H_2BO_3 \) to above 370 K temperature

Hint:

For industrial diborane production, boron trifluoride reacts with sodium hydride at 450 K, yielding diborane and sodium fluoride.

Answer 1

The Correct Option is C

Step 1: Industrial Preparation of Diborane Diborane (\( B_2H_6 \)) is typically produced industrially by the reaction of boron trifluoride (\( BF_3 \)) with sodium hydride (\( NaH \)) at high temperatures. \[ BF_3 + 6NaH \rightarrow B_2H_6 + 3NaF \] This reaction occurs at approximately 450 K, yielding diborane (\( B_2H_6 \)) efficiently. Conclusion Thus, the correct answer is: \[ \text{Reaction of } BF_3 \text{ with } NaH \text{ at 450 K} \]