M. Kanesato, T. Yokoyama, O. Itabashi
May 1, 1996
Citations
0
Influential Citations
41
Citations
Journal
Bulletin of the Chemical Society of Japan
Abstract
The preparation and characterization of praseodymium(III) and neodymium(III) complexes of heptadentate (N4O3) ligand trensal, tris[2-(salicylideneamino)ethyl]amine (H3L1), have been studied. These complexes (PrL1 and NdL1) were prepared by the reaction of the praseodymium(III) or neodymium(III) complex of 1,9-bis(2-aminoethyl)-1,4,6,9,12,14-hexaazacyclohexadecane with salicylaldehyde in acetonitrile. Alternatively, the reaction of tris(2-aminoethyl)amine and salicylaldehyde in the presence of praseodymium(III) or neodymium(III) salt in acetonitrile also gave praseodymium(III) and neodymium(III) complexes of trensal. The molecular structures of PrL1 and NdL1 were determined by X-ray structural analysis; these are rare examples of lanthanide heptadentate complexes in which the metal ions are coordinated by the four nitrogen atoms and the three oxygen atoms. The crystals of Pr(C27H27N4O3)·0.5CH3CN and Nd(C27H27N4O3)·0.5CH3CN are both trigonal, space group , a = 13.713(2), c = 8.093(3) A, U = 1318.0(7) A3, Z ...