`NaBH_(4)` is ionic compound contain `BH_(4)^(-)` tetrahydridoborate ion and in solid state `NaBH_(4)` has sodium chloride structure. Not all tetrahydridoborates are ionic. The beryllium, aluminium and transition metal borohydrides become increasingly covalent and volatile. In these type of tetrabydrido borate the `BH_(4)^(-)` form covalent bond with metal ion. One or more H atoms in a `BH_(4)^(-)` act as a bridged bond to metal, forming a three centre bond with two electrons shared by three atoms. The `BH_(4)^(-)` is usually in that it may fonn one two or three such three centre bonds to the metal ion when fonns covalent bond.
`Be(BH_(4))_(2)` and `AI(BH_(4))_(3)` are covalent and structures are given below:

Select incorrect statement about '`Li [AIH_(4)]`

Options

A. hybridisation of Al is same as B in `Na[BH_(4)]`
B. geometry around Al is same as `A1Cl_(4)^(-)`
C. `AlH_(4)^(-), BH_(4)^(-), AICl_(4)^(-)` iso-structural
D. `AlH_(4)^(-) ,AlCl_(4)^(-), BH_(4)^(-)`, are iso-electronic

Answer

D