Potentiometric study of the formation of hydroxo complexes of [Cu(terpy)]2+. Synthesis and crystal structure of [Cu(terpy) (H2O)](CF3SO3)2 |
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Authors: | Isabel Castro Juan Faus Miguel Julve Michèle Philoche-Levisalles |
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Institution: | 1. Department de Química Inorgànica, Facultat de Química de la Universitat de València, Dr. Moliner 50, 46100, Burjassot (València), Spain 2. Laboratoire de Chimie des Métaux de Transition, URA 419 C.N.R.S., Université Pierre et Marie Curie, 75252, Paris, France
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Abstract: | Two complexes of formula Cu(terpy)(H2O)](CF3SO3)2 (1) and Cu(terpy)(OH)]BPh4 (2) (terpy=2,2′∶6′,2″-terpyridine and BPh4=tetraphenylborate anion) have been synthesized and characterized by spectroscopic techniques. The x-ray crystal structure
of (1) has been determined by x-ray diffraction. The structure is made up of Cu(terpy)(H2O)]2+ mononuclear cations plus semi-coordinated CF3SO3
− anions. The coordination geometry around the copper atom is approximately elongated tetragonal octahedral. The oxygen atom
of water and the three nitrogen atoms of terpy occupy the equatorial sites whereas the apical ones are filled by trifluoromethanesulphonate
oxygen atoms. The formation of hydroxo complexes of Cu(terpy)(H2O)]2+ has been investigated by potentiometry in aqueous solutions and the constants of the Equilibria (1) and (2)
![MediaObjects/11243_2008_BF02910852_f1.jpg](/content/G760L82420768753/MediaObjects/11243_2008_BF02910852_f1.jpg) |
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