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DOI: 10.1039/A607278J (Paper) Reference Section for: J. Chem. Soc., Dalton Trans., 1997, 921-926

Dinuclear copper-(I) and -(II) complexes derived from a diprotonated Schiff-base cryptand

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Harry Adams, Neil A. Bailey, David E. Fenton, Michael B. Hursthouse, Wakako Kanda, Masatoshi Kanesato, K. M. Abdul Malik and Emily J. Sadler

Abstract

The reactions of the diprotonated Schiff-base cryptand derived from the bicyclocondensation of tris(2-aminoethyl)amine with 2,6-diacetylpyridine in the presence of acid and copper-(I) and -(II) tetrafluoroborates have been studied. In the former reaction a homodinuclear copper(I) complex of the neutral cryptand was recovered whereas in the latter a homodinuclear copper(II) complex of the bibracchial tetraimine Schiff-base macrocycle in which one pyridinyl unit has been eliminated was the product. The crystal structures of the two dinuclear complexes were determined. The CuI · ·[hair space] [hair space]· CuI separation in the cryptate complex is 6.25 Å and the CuII · ·[hair space] [hair space]· CuII separation in the macrocyclic complex is ca. 4.6 Å.

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