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Julio Zukerman-Schpector, Cristina C. Carvalho, Paulo C. Isolani, K. Umeda, G. Vicentini, R. Itri

Complexes of lanthanide picrates and bis(pentamethylene)urea. Structure of the Pr compound

Complexes of lanthanide picrates with bis(pentamethylene)urea (BPMU) with composition Ln(pic)₃ · 3(BPMU) (pic = picrate; Ln = La-Er,Y) were synthesized and characterized by CHN analyses, EDTA titrations of lanthanide ions, infrared absorption spectroscopy, X-ray powder patterns, absorption spectra of the Nd and Er compounds and emission spectra of the Sm and Eu compounds. X-ray single-crystal analysis of the Pr compound was carried out and showed that the coordination polyhedron is a distorted monocapped square antiprism with C^2v symmetry. This compound presents yellow crystals with symmetry of the monoclinic space group P2₁/c with a = 12.906(4) Å, b = 21.80(1) Å, c = 22.96(1) Å, β = 105.46(3)°.

Zeitschrift für Kristallographie, Oldenbourg Wissenschaftsverlag

Print ISSN: 0044-2968
Volume: 215, 03/2000
Pages: 174

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