Naslov
Preparation, structural and spectroscopic characterization of vanadium(IV) and vanadium(V) complexes with dipicolinic acid

Autori
Hakimi, Mohammad ; Kukovec, Boris-Marko ; Rezvaninezhad, Maryam ; Schuh, Esther ; Mohr, Fabian

Izvornik
Zeitschrift für anorganische und allgemeine Chemie (0044-2313) 637 (2011), 14/15; 2157-2162

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

Ključne riječi
vanadium; X-ray diffraction; dipicolinic acid; coordinated ethoxide; IR spectroscopy

Sažetak
The reaction of dipicolinic acid, dipicH2, with vanadyl sulfate in the mixture of ethanol and water led to the formation of [VO(dipic)(H2O)2] × C2H5OH (1) and [VO(dipic)(H2O)(OC2H5)] (2). Complex 1 was obtained first and complex 2 after prolonged standing of the mother liquor in air. Both complexes were characterized by elemental analyses, IR, Raman and UV-Vis spectroscopies and their structures were determined by X-ray diffraction. The vanadium(IV) ion in 1 and vanadium(V) ion in 2 are both coordinated by O, N, O’-tridentate dipicolinate ligand. Octahedral coordination of vanadium(IV) is completed by two water molecules in trans position and by an oxo O atom, while of vanadium(V) by oxo O atom and water molecule in trans position and by an ethoxide O atom. A co-crystallized ethanol molecule is also present in the crystal structure of 1. Molecules of [VO(dipic)(H2O)2] and ethanol are linked into a 2D network by the O–H...O hydrogen bonds in the structure of 1. Molecules of 2 are assembled into a 3D structure by the O–H...O hydrogen bonds.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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