TATIERSKY, J., P. SCHWENDT, Jaromír MAREK a M. SIVÁK. Racemic vanadium(V) oxo monoperoxo complexes with two achiral bidentate heteroligands. Synthesis, characterization, crystal structure and stereochemistry of K[VO(O2)(ox)(bpy)].3H2O and Pr4N[VO(O2)(ox)(phen)]. New Journal of Chemistry. Cambridge: Royal Soc Chemistry, 2004, roč. 28, č. 1, s. 127 - 133. ISSN 1144-0546.
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Základní údaje
Originální název Racemic vanadium(V) oxo monoperoxo complexes with two achiral bidentate heteroligands. Synthesis, characterization, crystal structure and stereochemistry of K[VO(O2)(ox)(bpy)].3H2O and Pr4N[VO(O2)(ox)(phen)]
Autoři TATIERSKY, J., P. SCHWENDT, Jaromír MAREK a M. SIVÁK.
Vydání New Journal of Chemistry, Cambridge, Royal Soc Chemistry, 2004, 1144-0546.
Další údaje
Originální jazyk angličtina
Typ výsledku Článek v odborném periodiku
Obor 10402 Inorganic and nuclear chemistry
Stát vydavatele Velká Británie a Severní Irsko
Utajení není předmětem státního či obchodního tajemství
Impakt faktor Impact factor: 2.735
Organizační jednotka Přírodovědecká fakulta
UT WoS 000188036800020
Klíčová slova anglicky vanadium(V); structure; X-ray; NMR; IR and Raman spectroscopies
Štítky IR and Raman spectroscopies, NMR, structure, vanadium(V), x-ray
Změnil Změnil: doc. RNDr. Jaromír Marek, Ph.D., učo 1989. Změněno: 20. 1. 2004 11:34.
Anotace
Two new racemic monoperoxo complexes of vanadium(V), K[VO(O2)(ox)(bpy)].3H2O (1) and Pr4N[VO(O2)(ox)(phen)](2) [bpy=2,2-bipyridine, phen=1,10-phenanthroline, ox=oxalate(2-) and Pr4N=tetra(n-propyl)ammonium(1+)], were synthesized. The solid complexes were characterized by X-ray structure analysis and IR and Raman spectroscopies. The coordination polyhedron of vanadium is a distorted pentagonal bipyramid. The five equatorial positions are occupied by the nu2-peroxo oxygen atoms, two oxygen atoms of the ox ligand and one nitrogen atom of bpy (resp. phen). The oxo ligand and the second nitrogen atom of bpy (resp. phen) are in axial positions. In each structure, the intermolecular distance, 3.5A, between the pairs of parallel bpy or phen ligands indicates a pi-pi interaction between the aromatic rings. The UV-vis spectra of aqueous solutions exhibit characteristic peroxo-to-vanadium CT bands at 422 nm (=32 m2 mol-1) for 1 and 428 nm (=29.4 m2 mol-1) for 2. From the 51V NMR measurements, the isomerization based on a mutual ox-bpy or ox-phen position change does not occur in aqueous solutions. The structure of both complex anions is maintained at 295 K for about 6 h after dissolution in water.
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