Preparation and vanadium-51 NMR characteristics of oxovanadium(V) compounds. Relation between metal shielding and ligand electronegativity

Fifteen Years of Dancing with Vanadium

“…In addition, these studies underlined the applicability of 51 V NMR spectroscopy and for the next decade we and other groups began to explore aqueous chemistry using this technique. The Rehder group had been a proponent for applications of 51 V NMR spectroscopy for some time, and had shown that vanadium has a very large chemical shift window, that readily allows for the identification of different compounds [23][24][25]. The vanadium nucleus is very sensitive to small structural variations, and is a very effective tool for investigation of vanadium compounds in solution.…”

Spektroskopische Untersuchung des [FCl2V(15N3S2)]--Ions; Kristallstruktur von [Na-Benzo-15-Krone-5][FCl2V(N3S2)] / Spectroscopic Investigation of the Ion [FCl2V(15N3S2)]-; Crystal Structure of [Na-Benzo-15-Crown-5][FCl2V(N3S2)]

“…Besser vergleichbar sind die (Beträge der) reduzierten Kopplungskonstanten K. Sie betragen 'K (15N -51V) * 4,5 für [FC12V (15N3S2) ] ' bzw. *K(14N -51V) = 7,3 für V(NrBu)(OfBu) 3 [27] und V 0 (N E t2) ( 0 /P r )2 [28]. Die kleinere Kopplungs konstante weist auf einen geringeren a(s)-Anteil in der V -N-Bindung und/oder geringere s-Elektronendichte an den K ernorten der koppelnden Kerne hin.…”

Bis[tetraethylammonium]-meso-bis[dichloro-μ-chloro-oxo-aquavanadat(IV)], [(C2H5)4N]2[{VOCl2(OH2)}2(μ-Cl)2]: Molekülstruktur und spektroskopische Charakteristika/ Tetraethylammonium raeso-Bis[dichloro-μ-chloro-oxo-aquavanadate(IV)], [(C2H5)4N]2[{VOCl2(OH2)}2(μ-Cl)2]: Molecular Structure and Spectroscopic Characteristics

“…[VOCl4_"(NR2) " r [3,6,7] zu grünen, wenig definierten, VO enthaltenden Lösungen. Eine Stabilisierung der fünfwertigen Stufe gelingt gelegentlich mit mehrzähnigen se kundären Aminen [7].…”