Lanthanum(III) complexes with phenylcyanamide ligands: Synthesis and crystal structure

Several novel mixed ligand lanthanum complexes with 1,10-phenantroline and phenylcyanamide derivatives with the formula of [La(phen)3Cl3·OH2] (1) and [La(phen)3L3] (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, 1H 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-Cl2pcyd and three phenanthroline ligands are coordinated to the central La atom in monodentate and bidentate manner, respectively.

Graphical abstractSeveral novel mixed ligand lanthanum complexes with 1,10-phenantroline and phenylcyanamide derivatives with the formula of [La(phen)3Cl3·OH2] (1) and [La(phen)3L3] (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 and characterized. Molecular structure of 3 is determined by single-crystal X-ray diffraction method.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► New lanthanum complexes with phen and phenylcyanamide derivatives are synthesized. ► The complexes are characterized by spectroscopic analysis and elemental analysis. ► The first crystal structure of lanthanide complex with pcyd ligand was reported.