give the structure of di boron B2H6
Diborane (B2H6) has D2h structure containing conventional covalent bond structure. It has four terminal and two bridged hydrogen atoms.
There are four terminal B-H bonds are two centre - two electron bonds. Two bridge B − H − B bonds are three centre - two electron bonds.
The bond between boron and hydrogen are held together by four electrons (each boron has 1 valence electron from 1 from hydrogen). It forms 3-centre-2-electron bonding. The structure looks like banana hence called as banana bond.
The bond length of B-H(bridge) and B-H(terminal) is 1.22 A and 1.19 A. The B-H(bridge) bond is weaker compared to B-H(terminal).