Question

Consider the following statements concernig diborane. Which are correct :– 

I. There is a free roation about B—B axis 

II. All the H atoms are bonded to B atoms in a similar way. 

III. Its final hydrolysis products are hydrogen and boric acid 

IV. It forms addition compounds with ammonia

(a) I & II 

(b) II & III 

(c) II & IV 

(d) I & IV

Answer 1

Correct option (c) II & IV 

Explanation:

In B₂H₂, there is no B—B axis. 4 H atoms are bonded to B–atoms thorugh 2C – 2e bonds while two H atoms are bonded to two B-atoms through 3C – 2e bonds and therefore, form two bridges of B......H.....B.