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Synthesis, crystal and molecular structures of 1D and 2D supramers of copper(II) with N,N′-{bis(pyridin-2-yl) benzylidene}butane-1,4-diamine

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Abstract

Reaction of copper(II) perchlorate with N,N′-{bis(pyridin-2-yl)benzylidene}butane-1,4-diamine (bpbd) yielded monoclinic crystals of bluish green [Cu(bpbd)(ClO4)]ClO4 (1), and a similar reaction in presence of azide anion, N3 − formed monoclinic crystals of dark green [Cu(bpbd)(N3)]2ClO4 (2). Crystal data for 1: space group P21/c, Z=4, a=17.3968(4) Å, b=9.3182(2) Å, c=17.6794(4) Å, β=102.149(1)°. The geometry around Cu(II) centre is distorted square pyramidal with axial site occupied by O atom of perchlorate and in plane Cu is bonded to four N atoms of the organic ligand. The intermolecular C–H...π stacking in 1 forms a zigzag chain (1D) supramer. Crystal data for 2: space group C2/c, Z=4, a=22.3109(4) Å, b=17.7832(3) Å, c=14.3389(2) Å, β=92.553(1)°. In dinuclear 2, Cu(II) has tetragonally distorted octahedral geometry coordinated by four N atoms of bpbd, with the fifth and sixth positions occupied by N atoms of two end-on bridging azides. The π...π interaction leads to a two dimensional (2D) sheet within which the counter anions are embedded. Both the compounds 1 and 2 show simple paramagnetism. Cyclic voltammetry and fluorescence spectra are also reported.

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Acknowledgements

Financial support from the DST and CSIR New Delhi, India is gratefully acknowledged. We are indebted to Prof. Joan Ribas, Departament de Quimica Inorganica, Universitat de Barcelona, Spain for variable-temperature magnetic study.

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Authors and Affiliations

  1. Department of Chemistry, The University of Burdwan, Burdwan, 713104, India

    Sk Hafijur Rahaman, Doyel Bose, Rajarshi Ghosh & Barindra K. Ghosh

  2. Department of Physics, Jadavpur University, Kolkata, 700 032, India

    Golam Mostafa

  3. X-ray Crystallopraphy Unit, School of Physics, University Sains Malaysia 11800 USM, Penang, Malaysia

    Hoong-Kun Fun

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  1. Sk Hafijur Rahaman
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  2. Doyel Bose
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  3. Rajarshi Ghosh
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  6. Barindra K. Ghosh
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Correspondence to Barindra K. Ghosh.

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Rahaman, S.H., Bose, D., Ghosh, R. et al. Synthesis, crystal and molecular structures of 1D and 2D supramers of copper(II) with N,N′-{bis(pyridin-2-yl) benzylidene}butane-1,4-diamine. Struct Chem 18, 237–244 (2007). https://doi.org/10.1007/s11224-006-9094-1

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