Question

The hybridization of the central atom in the vapor state of $BeC{l}_2$ is:

• A. sp³
• B. sp²
• C. sp
• D. indeterminable because of polymeric structure

Answer 1

The correct option is C

sp

In the vapour state, $BeC{l}_2$ exists as a monomer. It does not exist as a dimer/polymer.

Hence it is in the linear shape: Cl-Be-Cl

Here, the central atom is sp hybridized.

In the solid state,$BeC{l}_2$ has a polymeric structure, whereeach Be atom is linked with 4Cl atoms.Each Chlorine atom is covalently bonded to one Be atom while one of the lone pairs of this Chlorine atom forms a coordinate covalent bond with another Be atom. Hence, Be atom is in $s{p}^3$ hybridized where two empty orbitals and two half-filled orbitals undergo hybridization.