Structures of $\mathrm{BeCl}_{2}$ in solid state, vapour phase and at very high temperature respectively are :
Solution
<p>$\mathrm{BeCl}_2$ forms a polymeric structure in the solid state due to coordination bonds formed by chlorine donating a lone pair of electrons to the beryllium atoms. </p>
<p>In the vapour phase at moderate temperatures, $\mathrm{BeCl}_2$ exists as a dimer, forming a bridge structure with two chlorine atoms connected to two beryllium atoms.</p>
<p>At very high temperatures, $\mathrm{BeCl}_2$ exists as monomers due to the high kinetic energy of the molecules, which overcomes the dimerisation tendency.</p>
About this question
Subject: Chemistry · Chapter: s-Block Elements · Topic: Alkali Metals
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