The investigation into synthesizing new metal organic compounds with the general formula Cu(S-pyrazine)X2 using monosubstituted pyrazines has led to the generation of a new family of compounds Cu(S-pyrazine)2X2 with similar structure and magnetic properties. The bis(S-pyrazine)dihalocopper(II) compounds [where S = Cl, CN, OCH3, and OCH2CH3 and halide = Cl or Br] have been characterized by IR, powder X-ray diffraction, single-crystal X-ray diffraction, and temperature dependent magnetic susceptibility. The bis(chloropyrazine)dihalocopper(II) compounds crystallize in the monoclinic space group P21/n while the methoxy and ethoxy analogues crystallize in the triclinic space group P. This structurally related family of compounds exhibit antiferromagnetic interactions with exchange constants of approximately −25 K for the chloride analogues and −50 K for the bromide analogues.
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