Compounds of cobalt(II), nickel(II) and copper(II) with 2,4,4,9-tetramethyl-1,5,9-triazacyclododec-1-ene

Abstract

Compounds of the macrocycle 2,4,4,9-tetramethyl-1,5,9-triazacyclododec- 1-ene (dla) with cobalt(II), nickel(II) and copper(II) are formed by reaction with acetone of complexes of these ions with 4-methyl-4- azaheptane-1,7-diamine. The preparations of M(dla)(NCS)₂, (M = Co^II, Ni^II and Cu^II), [M(dla)-(en)] (ClO₄)₂, [{M(dla)(OH)}₂] (ClO₄)₂, [{M(dla)}₂CO₃] (ClO₄]₂, [M(dla)(acac)] ClO₄, [{M(dla)}_2- C₂O₄] (ClO₄)₂ (M = Ni^II, Cu^II), and [{Ni(dla)Cl}₂](ClO₄)₂ are reported. The compounds are all assigned five-coordinate structures. The compounds [{M(dla)}₂CO₃] (ClO₄)₂, [{Cu(dla)(OH)}₂]-(ClO₄)₂ and [{Cu(dla)}₂C₂O₄](ClO₄)₂ show appreciable antiferromagnetic spin-coupling.