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Synthesis, Crystal Structure and Spectroscopic Properties of an Oximato Bridged Cu(II) Dimer

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Abstract

Schiff-base condensation of a equimolar proportion of diacetyl-monoxime monohydrazone and 1-methylimidazole-2-carboxaldehyde in methanol gives rise to the imidazole azine, 3-(1-methylimidazol-2-yl)methylenehydrazonobutan-2-one oxime(HL). Reaction of 1:1 stoichiometric proportion of HL with copper(II)perchlorate hexahydrate in methanol yields a dimeric oximato bridged copper compound, [Cu2L2(H2O)2](ClO4)2 (1). The compound is characterized by C, H and N analyses, FT-IR, ESI–MS, conductivity measurement, UV–Vis spectra and X-ray single crystal diffraction. The title compound (1) crystallizes in the monoclinic space group P21/c with a = 6.8533 (8), b = 18.413 (2), c = 11.7399 (14) Å, β = 93.685 (2)°, V = 1478.4 (3) Å3 and Z = 2. The geometry around each copper center is distorted square pyramidal. The copper(II) dimer shows antiferromagnetic interaction mediated by symmetric disposition of oximato groups.

Graphical Abstract

A dimeric oximato bridged copper compound, [Cu2L2(H2O)2](ClO4)2 (1), with antiferromagnetic interaction was characterized by C, H and N analyses, FT-IR, ESI–MS, conductivity measurement, UV–Vis spectra and X-ray single crystal diffraction.

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Acknowledgments

J.P.N. gratefully acknowledges the financial support received from the Department of Science and Technology, Government of India, New Delhi. LPL and MLZ appreciated the National Natural Science Foundation of China (21001070 for Youth), the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry (20093602), the Natural Science Foundation of Shanxi Province (2010011011-2), and Shanxi Scholarship Council of China (200808).

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Authors and Affiliations

  1. Department of Chemistry, Jadavpur University, Calcutta, 700 032, India

    Jnan Prakash Naskar & Chiranjan Biswas

  2. Institute of Molecular Science, Key Laboratory of Chemical Biology and Molecular Engineering of the Education Ministry, Shanxi University, 92 Wucheng Road, Taiyuan, Shanxi, 030006, People’s Republic of China

    Liping Lu & Miaoli Zhu

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  1. Jnan Prakash Naskar
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  2. Chiranjan Biswas
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  3. Liping Lu
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  4. Miaoli Zhu
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Correspondence to Jnan Prakash Naskar or Miaoli Zhu.

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Naskar, J.P., Biswas, C., Lu, L. et al. Synthesis, Crystal Structure and Spectroscopic Properties of an Oximato Bridged Cu(II) Dimer. J Chem Crystallogr 41, 502–507 (2011). https://doi.org/10.1007/s10870-010-9909-1

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  • DOI: https://doi.org/10.1007/s10870-010-9909-1

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