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Synthesis, characterization, and magnetic study of pyrazine bridged polymeric complexes of copper(II)
Authors:Anamika Das  Subrata K. Dey
Affiliation:a Department of Chemistry, Jadavpur University, Raja S.C. Mallik Road, Kolkata 700 032, West Bengal, India
b 257 Stepan Chemistry Hall, Notre Dame, IN 46556, United States
Abstract:The synthesis, structural characterization and magnetic property of two new coordination polymers [Cu(pyz)(μ-CH3CO2)4]n (1) and [Cu(pyz)(μ-CCl3CO2)4]n (2) (pyz = pyrazine) are reported. Here, the carboxylato bridged two dinuclear copper(II) complexes are linked through pyrazine giving a 1-D alternating chain. The magnetic property of the complexes indicates a significant difference originated from the introduction of electron withdrawing substituent on the bridging dicarboxylate. Complex 1 exhibits strong antiferromagnetic interactions with J = −344.61 cm−1, whereas 2 exhibits comparatively less strong antiferromagnetic coupling with J = −238.53 cm−1.
Keywords:Copper(II)   Carboxylate   Pyrazine   Magnetic properties
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