Abstract
Three new salen-type 3d–4f heteronuclear metal complexes incorporating with the semi-rigid ligand N,N′-bis(2-hydroxy-3-methoxybenzylidene)-1,2-diaminocyclohexane (H2L), namely, [(CuClL)LaCl2(CH3OH)3]·H2O (1), [(CuClL)DyCl2(CH3OH)2] (2) and [(CuClL)2GdCl2(CH3OH)2] (3), have been isolated. X-ray crystallographic analysis indicates that 1 and 2 possess the typical heterodinuclear structures, while, complex 3 has a trinuclear structure. In 1–3, the Cu2+ ion is in the N2O2 cavity of the ligand and the lanthanide ions are to the O2O2 set of the ligand. The coordination numbers of the lanthanide ions are reduced from 9 to 8 along with lanthanide contraction. These results further enrich the structures of salen type 3d–4f heteronuclear complexes. Pictogram
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