Abstract
Cu(OPph3)2Cl2 exists in yellow α- and orange β-isomeric forms. β-Cu(OPph3)2Cl2 was prepared by thermal decomposition of Cu(OPph3)4Cl2·2 H2O and by reaction of CuCl2 with OPph3 in acetone—ethanol mixture at higher temperature. The results of magnetic measurements, electronic andESR spectra show that the structure of β-isomer differs from the known structure of the α-isomer by a different degree of distortion of the coordination tetrahedron. α-Cu(OPph3)2Cl2 is thermodynamically more stable then β-Cu(OPph3)2Cl2.
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