Boron fluoride exists as BF 3 but boron hydride doesn’t exist as BH 3 . Give reason. In which form does it exist? Explain its structure.

Options

1. ABH 3 is highly unstable and exists only in a dimerized form, (BH 3 ) 2 .
2. BBH 3 is highly unstable and exists only in a polymeric form.
3. CBH 3 is highly stable and exists as a monomer, BH 3 .
4. DBH 3 is highly stable and exists as a dimer, (BH 3 ) 2 .