Question

The correct statement about B₂H₆ is:

(1) Terminal B–H bonds have less p-character when compared to bridging bonds.

(2) The two B–H–B bonds are not of same length

(3) All B–H–B angles are of 120°

(4) Its fragment, BH₃ , behaves as a Lewis base

Answer 1

(1) Terminal B–H bonds have less p-character when compared to bridging bonds.

• θ₂ > θ₁ ,
• ∴ B–H (terminal) having less pcharacter as compare to bridge bond.
• Both B–H–B bridge bond having same bond length.
• B–H–B bond angle is »90° ·
• BH₃ is e^– deficient species and therefore act as lewis acid