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Copper(II), nickel(II), cobalt(II) and zinc(II) complexes of the 22-membered hexa-aza macrocycle 1,4,7,16,19,22-hexa-aza[9.9]metacyclophane (L) have been prepared and characterised. The crystal structure of a copper(II) chloro complex has been determined. The complex exists in two forms, one form (Type 1) with an inversion centre has both copper atoms in essentially square pyramidal stereochemistry...
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