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Magnetic and electrochemical studies of the structurally characterised dicopper(II) complex [Cu2L(MeCN)2-(ClO4)2][ClO4]2 1, the first to be bridged by two pyridazine units held within a (2 + 2) macrocyclic ligand, reveal strong antiferromagnetic exchange as well as two well separated reversible one-electron reductions at positive potentials.
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Brooker et al. (1996) studied this question.
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