What is the structure of BeCl2

Question:

What is the structure of BeCl2 molecule in gaseous and solid-state?

Solution:

The gaseous/vapour state is different than the solid-state. The structure of BeCl2 in the solid-state is a polymeric chain structure. BeCl2 tends to form a chloro-bridged

dimer at temperatures below 1200K and dissociates into a linear monomer at high temperatures of the order of 1200 K.

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