In polymeric (BeCl_2)_n,there are | vedclass

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(A) In the polymeric structure of beryllium chloride,each $Be$ atom is bonded to four $Cl$ atoms.Each bridging $Cl$ atom is bonded to two $Be$ atoms,o

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three-centre four-electron bonds

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(A) In the polymeric structure of beryllium chloride,each $Be$ atom is bonded to four $Cl$ atoms.Each bridging $Cl$ atom is bonded to two $Be$ atoms,one via a normal covalent bond and the other via a coordinate (dative) bond.This bridging unit involves three atoms $(Be-Cl-Be)$ sharing four electrons (two from the covalent bond and two from the lone pair of $Cl$ used in the dative bond).Therefore,these are referred to as three-centre four-electron bonds.

In polymeric $(BeCl_2)_n$,there are

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