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Two new macrocyclic complexes with C-methyl substituents on the framework,namely, [CuL](ClO4)2 (L = 5,12-dimethyl- 1,8-dihydroxyethyl- 1,3,6,8,10,13-hexaazacyclotetradecane) 1 and [NiL](ClO4)2 2, have been synthesized and structurally characterized throug