Lanthanum(III) complexes with phenylcyanamide ligands: Synthesis and crystal structure
摘要:
Several novel mixed ligand lanthanum complexes with 1,10-phenantroline and phenylcyanamide derivatives with the formula of [La(phen)3Cl(3)center dot OH2] (1) and [La(phen)(3)L-3] (phen = 1,10-phenantroline; L = 2-clorophenylcyanamide (2), 2,5-dichlorophenylcyanamide (3), 2,4-dichlorophenycyanamide (4) and 2,4,5-trichorophenycyanamide (5)) are successfully synthesized in aqueous solution. The complexes are characterized by spectroscopic analysis such as infrared, H-1 NMR, UV-Vis spectroscopy as well as elemental analysis. The molecular structure of 3 is determined by single-crystal X-ray diffraction method. Three 2,5-Cl(2)pcyd and three phenanthroline ligands are coordinated to the central La atom in monodentate and bidentate manner, respectively. (C) 2011 Elsevier B. V. All rights reserved.