NCERT Class XI Chemistry Hydrogen Solutions

Question : 9

Total: 36

What characteristics do you expect from an electron-deficient hydride with respect to its structure and chemical reactions?

Solution:

It is expected to be a Lewis acid. For example, diborane B2H6 (dimer of BH3) forms complex with LiH which gives H– ion (Lewis base).

2LiH

Lithium‌hydride(Lewis‌base)

B2H6

Diborane(Lewis‌acid)

→

2Li+[BH4]−

Lithium‌borohydride(Complex)

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