Two new copper(II) complexes of composition [trans-Cu(en)2(H2O)2](L1)2, 1 and [trans-Cu(en)2(H2O)2](L2)2, 2 (L1 = p-toluenesulphonate, L2 = 5-bromo-2-methoxybenzenesulphonate) were obtained by the addition of ethylenediamine to hydrated Cu(II) sulphonates, Cu(L1/L2)2·nH2O in methanol–water solution. The newly synthesized complex salts have been characterized by elemental analyses, TGA, spectroscopic techniques (electronic and FT-IR), magnetic moment determination and conductance measurements. The complex salt 1 crystallizes in the monoclinic system with space group P21/c and complex salt 2 crystallizes in the triclinic system with space group P. X-ray structure determination revealed ionic structures consisting of one complex cation [Cu(en)2(H2O)2]2+ and two respective sulphonate anions in 1 and 2. A three dimensional hydrogen bonding network formed by N–H…O, C–H…O and O–H…O through second sphere interactions besides electrostatic forces of attraction stabilize crystal lattice in both complex salts.

Second sphere coordination complexes: Synthesis, characterization, single crystal structure and packing analyses of [trans-Cu(en)2(H2O)2](L1/L2)2 where L1 = p-toluenesulphonate, L2 = 5-bromo-2-methoxybenzenesulphonate

FERRETTI, Valeria
2010

Abstract

Two new copper(II) complexes of composition [trans-Cu(en)2(H2O)2](L1)2, 1 and [trans-Cu(en)2(H2O)2](L2)2, 2 (L1 = p-toluenesulphonate, L2 = 5-bromo-2-methoxybenzenesulphonate) were obtained by the addition of ethylenediamine to hydrated Cu(II) sulphonates, Cu(L1/L2)2·nH2O in methanol–water solution. The newly synthesized complex salts have been characterized by elemental analyses, TGA, spectroscopic techniques (electronic and FT-IR), magnetic moment determination and conductance measurements. The complex salt 1 crystallizes in the monoclinic system with space group P21/c and complex salt 2 crystallizes in the triclinic system with space group P. X-ray structure determination revealed ionic structures consisting of one complex cation [Cu(en)2(H2O)2]2+ and two respective sulphonate anions in 1 and 2. A three dimensional hydrogen bonding network formed by N–H…O, C–H…O and O–H…O through second sphere interactions besides electrostatic forces of attraction stabilize crystal lattice in both complex salts.
2010
R. P., Sharma; A., Saini; A., Singh; S., Singh; P., Venugoplalan; Ferretti, Valeria
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/1399404
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