Phase transition in dichloro(ethylenediamine) copper(II) crystals [(En)CuCl(μ3-Cl)] and their structure

Abstract

Dichloro(ethylenediamone)copper(II) crystals undergo a phase transition at 138 K. X-ray crystal structure analysis at 123 K and 173 K showed that the phase transition is associated with ordering of both carbon atoms; space group changes from P2(1)/m to P2(1)/c, and the c parameter of the unit cell is nearly doubled.