Abstract
The conjugate system 1 has been prepared through reaction of 2-chloromethylanthraquinone with a five-fold excess of cyclam in chloroform at room temperature. Reaction of 1 with NiX 2·6H 2O (XCl, ClO 4) gave the corresponding Ni( 1)X 2 complexes, in which the metal centre has been incorporated by the tetraaza-macrocyclic subunit. The redox behaviour of the nickel(II) complexes has been investigated in a CH 2Cl 2 solution of 0.1 M Bu 4NX, by voltammetric techniques. Two-phase reduction of the quinone subunit of the Ni( 1)X 2 complex in CH 2Cl 2 by aqueous Cr II takes place at a rate much higher than that observed for the simple anthraquinone molecule, but the reduced conjugate system partitions between CH 2Cl 2 and water.
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