what is borane ?? give itz structure ( fig with explanation )

Asked by shuchi.saumya | 18th Aug, 2010, 12:00: AM

Expert Answer:

In diborane (B2H6), each Boron atom uses sp3 hybrids for bonding.

B

Electronic configuration = 1s2 2s2 2p1

It undergoes sp3 hybridisation.

 

Out of the four sp3 hybrid electrons, two singly occupied orbitals bond with singly occupied 1s orbital of H. These are normal 2 centre 2 electron bond. 2 centres (B,H)

The sp3 hybrid orbital which is without an electron, forms a bond with singly occupied orbital of the second B and singly occupied 1s orbital of H. So, w can say that there are three cetres – B, H and B . Tehre are two electrons – one from H and one from one of the borons sinceone B does not have any electron. So, three centres (B, H, B ) share two electrons.  This bond is a bridge bond also referred as banana bond.

The fourth singly occupied B atom forms a banana bond with the other B and H similarly.

Answered by  | 19th Aug, 2010, 09:15: AM

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