Naslov
Preparation, spectroscopic, structural and thermal characterization of vanadium complexes with 2- quinaldic acid

Autori
Smrečki, Neven ; Kukovec, Boris-Marko ; Popović, Zora

Izvornik
Monatshefte für Chemie (0026-9247) 143 (2012), 11; 1471-1477

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
metal complexes; IR spectroscopy; thermal analysis; X-ray structure determination

Sažetak
The reactions of vanadyl sulfate pentahydrate or vanadyl acetylacetonate with 2-quinaldic acid (2- quinH) were investigated. Six new vanadium complexes [VO(2-quin)2] (1), [VO(2-quin)2] ∙ CHCl3 (2), [VO(2-quin)2(py)] (3), [VO(2- quin)2(4-pic)] (4), [VO2(2-quin)(4-pic)] (5) and [VO(2- quin)2(H2O)] ∙ 2DMSO (6) were prepared and characterized by infrared spectroscopy and thermal analysis (TGA/DTA). The vanadium(V) complex [VO2(2-quin)(4-pic)] (5) was obtained accidently by the oxidation of 1, dissolved in 4-picoline, upon prolonged standing in air. The crystal structure of 5 was determined by single crystal X- ray structural analysis. The coordination environment of the vanadium(V) ion in 5 could be described as an intermediate between a trigonal bipyramid and a square pyramid, with two oxo O atoms in cis position, one 2-quinaldate ligand bound in a N, O-chelated mode and one 4-picoline molecule. The compound crystallizes in the P21/a space group of the monoclinic crystal system, with the parameters of the unit cell: a = 7.2691(7) Å, b = 13.0769(12) Å, c = 15.7840(15) Å, β = 91.252(8)°, Z = 4.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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