Question

Which one of the following is not true about diborane?

• A. It has two bridging hydrogens and four terminal hydrogens
• B. When methylated, the product is $M{e}_4{B}_2{H}_2$
• C. The bridging hydrogen are in a plane perpendicular to the rest of the $B-H$ bonds
• D. All the six $B-H$ bond distances are equal

Answer 1

The correct option is D All the six $B-H$ bond distances are equal



In diborane, terminal $B-H$ bonds are shorter than bridged $B-H$ bonds since bridged bonds are 3c-2e bonds.