In the solid state, Beryllium chloride () forms a polymeric structure. What is the nature of the bonding that links the individual units together in this solid chain?

Question

In the solid state, Beryllium chloride ($BeCl_2$) forms a polymeric structure. What is the nature of the bonding that links the individual $BeCl_2$ units together in this solid chain?

Prashant Kotian · Accepted Answer

Correct answer: C. In solid state, exists as a polymeric chain where Chlorine atoms form bridges between Beryllium atoms. Because Be is electron-deficient, Cl donates a lone pair into the empty orbital of an adjacent Be atom, forming a coordinate covalent (dative) bond. This creates a bridge bond.

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