Chapter 19, Problem 19.124CHP

Interpretation Introduction

Interpretation:

The aluminium-boron hydride ($AlB{H}_6$) structure should be suggested.

Concept Introduction:

Boron hydrides: The boron hydrides (or) boranes are volatile molecular compounds with formulas ($B_n{H}_m$).  The simplest is diborane, the dimer of the unstable $B{H}_3$.

The diborane molecules has a structure in which two ${\text{BH}}_{\text{2}}$ groups are connected by two bridging $\text{H}$ atoms.  The geometry about the (B) atoms are roughly tetrahedral and the bridging $\text{B-H}$ bonds are significantly longer than the terminal $\text{B-H}$ bonds 133 pm versus 119 pm.