A trinuclear copper(II) complex with 2,5-pyridine-dicarboxylato bridges - [Cu3(2,5-pydc)2(Me5dien)2(H2O)2(BF4)2] · H2O: Synthesis, crystal structure and magnetic properties |
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| Authors: | Cristian D Ene Floriana Tuna |
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| Institution: | a Inorganic Chemistry Laboratory, Faculty of Chemistry, University of Bucharest, Street Dumbrava Rosie 23, 020464 Bucharest, Romania
b School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, UK |
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| Abstract: | A trinuclear copper(II) complex, Cu3(2,5-pydc)2(Me5dien)2(BF4)2(H2O)2] · H2O 1, has been constructed from 2,5-pyridine-dicarboxylato bridges (2,5-pydc2−) and N,N,N′,N″,N″-pentamethyl-diethylenetriamine (Me5dien) acting as a blocking ligand. The copper ions, within the centrosymmetric trinuclear cations, are connected by two 2,5-pydc2− bridges, with an intramolecular Cu···Cu separation of 8.432 Å. The central copper ion exhibits an elongated octahedral geometry, with semicoordinated  ions, while the terminal ones are pentacoordinated (distorted square-pyramidal geometry). The cryomagnetic investigation of 1 reveals an antiferromagnetic coupling of the copper(II) ions (J = −5.9 cm−1, H = −JSCu1SCu2 − JSCu2SCu1a). |
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| Keywords: | Copper Trinuclear complexes 2 5-Pyridine-dicarboxylato bridges Crystal structure Magnetic properties |
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