Question

Among the following statements correct set of statements is

(a) B₂H₆ is Lewis acid
(b) B₂H₆ has planar structure
(c) All B-H Bond lengths are equal in B₂H₆
(d) In B₂H₆ four 3C-2e^- bonds are present
(e) B₂H₆ can be prepared by reaction of BF₃ and NaBH₄

(1) a, b, c, d, e
(2) a, e
(3) a, b
(4) d, e

Answer 1

Correct option is (2) a, e

B₂H₆ have 4 2c-2e bonds and 2 3c-2e bonds. Bridging bonds have larger bond length than terminal bonds. Angle between terminal bonds is more than angle between bridging bonds if all 4 terminal bonds are in one plane then bridging bonds are in perpendicular plane.