Formation of axial phenolate–metal bonds in square-pyramidal complexes
In: J. Chem. Soc., Dalton, 1996, S. 2233-2237
Online
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Zugriff:
Copper(II) complexes derived from tripodal ligands capable of forming 5,6,6- or 5,5,6-membered chelate ring sequences have been synthesised and characterised. The crystal structures of two complexes [CuL-(O2CBut)]·MeCN [HL =(2-hydroxy-5-nitrophenylmethyl)(pyridin-2-ylethyl)(pyridin-2-ylmethyl)amine] and [CuL(O2CMe)]·H2O [HL =(2-hydroxy-5-nitrophenylmethyl)bis(pyridin-2-ylmethyl)amine] have been solved. They are neutral, mononuclear copper(II) species in the solid state. In contrast to copper(II) complexes derived from related tripodal ligands forming 6,6,6-membered chelate rings, the present complexes have an axial phenolate–copper(II) bond in their square-pyramidal structures. The formation of this bond is related to the steric factors arising from the flexibility of the ligand pendant arms. The complex [CuL(O2CMe)] exhibits structural features related to the biosite in galactose oxidase; an acetate co-ordinates to copper equatorially and a phenolate oxygen atom occupies the axial position.
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Formation of axial phenolate–metal bonds in square-pyramidal complexes
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Autor/in / Beteiligte Person: | He, Qing-Yu ; Campbell, Ian K. ; Adams, Harry ; Bailey, Neil A. ; Fenton, David E. |
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Zeitschrift: | J. Chem. Soc., Dalton, 1996, S. 2233-2237 |
Veröffentlichung: | Royal Society of Chemistry (RSC), 1996 |
Medientyp: | unknown |
ISSN: | 1364-5447 (print) ; 0300-9246 (print) |
DOI: | 10.1039/dt9960002233 |
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