Which of the following is the electron deficient molecule?

Step-by-step solution

In diborane, 8 covalent bonds and 12 electrons are present. But it requires a total 14 electrons to form bonding. It lacks 2 electron pairs and forms a 3 c-2 e⁻ bond. Thus B ₂ H ₆ is electron deficient. Related Theory The boron atom is known to be s p^3 hybridized and has four hybrid orbitals. The two electrons of the hybrid orbitals in each of the boron atoms form 2 bonds with the Is hydrogen atoms. The two atoms of boron left with that of each unpaired electron orbital and empty orbital forms the two bridging (B-