The bimetallic cyclosiloxanolate cluster complexes Na[(PhSiO2)6Cu4Ni2(μ6-Cl)(PhSiO2)6] (1) and Na[(PhSiO2)6Cu3Ni3(μ6-Cl)(PhSiO2)6] (2) were prepd. by Na+ and Ni2+ ion exchange from in situ generated Na2{[(PhSiO2)6]2Na4Ni4(OH)2}. Complexes 1 and 2 were characterized by anal., spectroscopic and electrochem. methods as well as complex 2 by single-crystal x-ray diffraction (2·7DMSO·H2O: orthorhombic, space group P212121, R = 0.076). The x-ray structure shows a sandwich-type array comprising two superimposed cyclosiloxanolate rings and an M6Cl unit in between. For the 1st time the regioselectivity of the metal ion exchange could be deduced from the x-ray structural parameters.
Bimetallic Cyclooligosiloxanolate Complexes of Copper and Nickel / Zucchi, Claudia; M., Mattioli; Cornia, Andrea; FABRETTI COSTANTINO, Antonio; Gavioli, Giovanna; M., Pizzotti; R., Ugo; Y. A., Pozdniakova; O. I., Shchegolikhina; A. A., Zhdanov; Palyi, Gyula. - In: INORGANICA CHIMICA ACTA. - ISSN 0020-1693. - STAMPA. - 280:(1998), pp. 282-287.
Bimetallic Cyclooligosiloxanolate Complexes of Copper and Nickel
ZUCCHI, Claudia;CORNIA, Andrea;FABRETTI COSTANTINO, Antonio;GAVIOLI, Giovanna;PALYI, Gyula
1998
Abstract
The bimetallic cyclosiloxanolate cluster complexes Na[(PhSiO2)6Cu4Ni2(μ6-Cl)(PhSiO2)6] (1) and Na[(PhSiO2)6Cu3Ni3(μ6-Cl)(PhSiO2)6] (2) were prepd. by Na+ and Ni2+ ion exchange from in situ generated Na2{[(PhSiO2)6]2Na4Ni4(OH)2}. Complexes 1 and 2 were characterized by anal., spectroscopic and electrochem. methods as well as complex 2 by single-crystal x-ray diffraction (2·7DMSO·H2O: orthorhombic, space group P212121, R = 0.076). The x-ray structure shows a sandwich-type array comprising two superimposed cyclosiloxanolate rings and an M6Cl unit in between. For the 1st time the regioselectivity of the metal ion exchange could be deduced from the x-ray structural parameters.
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