Q19 of 39 Page 305

Draw the structure of (i) BeCl2 (vapour) (ii) BeCl2 (solid).

(i) In the vapour state, BeCl2 exists as a chlorobridged dimer.



This chlorobridged dimer dissociates into the linear monomer at high temperatures (1200K)


(ii) In the vapour state, BeCl2 has polymeric structure with chlorobridges. The structure is given below:



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