Tl2C2O4.H2C2O4, a new crystalline form of thallium(I) oxalate

O. E. PIRO; G. A. ECHEVERRIA; A. C. GONZALEZ-BARO ; E. J. BARAN

ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B - A JOURNAL OF CHEMICAL SCIENCES

VERLAG Z NATURFORSCH

Lugar: Tubingen; Año: 2015 vol. 70 p. 249 - 252

0932-0776

The title compound was prepared by reaction, in aqueous solution, of Tl2CO3 and H2C2O42H2O in a 1:2 molar ratio. Its crystal structure was solved by X-ray diffraction methods. It crystallizes in the monoclinic space group P21/a with Z = 2 molecules per unit cell. The oxalic acid molecule and the oxalate anion are planar, at crystallographic inversion centers, and linked to each other by strong OHH bonds giving rise to a polymeric structure. The Tl(I) ion is in a distorted polyhedral coordination with nine neighboring O-atoms, six of oxalate anions and four others of oxalic acid molecules. The FTIR and FT-Raman spectrum of the compound were also recorded and briefly discussed.