Solid BeH_2 and solid BeCl_2 differ in | vedclass

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Question

(C) Both $BeH_2$ and $BeCl_2$ in their solid states exhibit $sp^3$ hybridisation and exist as polymeric structures.However,they differ in their nature

Vedclass · Accepted Answer

Octet completion

Vedclass · Answer

(C) Both $BeH_2$ and $BeCl_2$ in their solid states exhibit $sp^3$ hybridisation and exist as polymeric structures.However,they differ in their nature of bonding and octet completion.In solid $BeCl_2$,the $Be$ atom completes its octet through coordinate bonds formed by the lone pairs of chlorine atoms in a polymeric chain.In contrast,$BeH_2$ is an electron-deficient polymer involving $3c-2e$ (three-center two-electron) bonds,where the octet of $Be$ is not fully completed in the same manner as in $BeCl_2$.Therefore,the correct answer is $(C)$.

Solid $BeH_2$ and solid $BeCl_2$ differ in

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