In what state does BeCl2 in vapour phase exists below 900 degree C?

BeCl2 in vapour phase exists as a mixture of monomer BeCl2 and dimer Be2Cl4.


  • Monomer is defined as a simple molecule with two or more binding sites through which it forms covalent linkages with other monomer molecules to form the macromolecule.
  • All simple molecules cannot behave as monomers but only those with two or more bonding sites can act as monomers.
  • Monomers are classified on the basis of their origin and synthesis.


  • A dimer is an oligomer consisting of two monomers joined by bonds that can be either strong or weak, covalent or intermolecular.

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