Research presented in this thesis falls into four areas. 1) Vibrational spectra of pentafluorides. 2) Preparation and spectra of NbF5 and TaF5 complexed with Lewis bases. 3) Preparation and some properties of some Nb, and Ta (V) fluoride-halides and pseudohalides. 4) 93Nb n.q.r. spectra of some compounds derived from 93Nb n.q.r. spectra of NbF5 and vibrational soectra of NbF5 and TaF5 are interpreted in terms of a very small deviation from C4v symmetry in the tetrameric molecules of the solid state. I.R. spectra suggest that NbF5, and TaF5 are polymeric in the liquid state up to at least 15
The infrared spectra of the pentafluoroethyl halides have been investigated in the gaseous state wit...
The goal of this study was to develop new superacid systems based on fluorosulfuric acid, HSO₃F, (th...
The reactions of niobium and tantalum pentahalides, MX5, with dialkylureas (tetramethyl- and tetraet...
Research presented in this thesis falls into four areas. 1) Vibrational spectra of pentafluorides. 2...
A one-step metal oxidation/ligand redistribution reaction was developed to synthesize niobium(V) and...
The synthesis and the spectroscopic characterization of fluoride-alkoxides of niobium and tantalum i...
The synthesis and the spectroscopic characterization of fluoride-alkoxides of niobium and tantalum i...
The pentafluorides of niobium and tantalum reacted with benzophenone (Ph2CO), (2-diphenylphosphino)p...
Niobium and tantalum compounds lived for long time in the shadow of metal complexes of group 4, prob...
The reactions of various amines with vanadium and niobium pentafluoride have been studied. Pyridine...
The room temperature reactions of a series of 1,2-dialkoxyalkanes ROCH2CH(R')OR" with MX5 (M = Nb, T...
The metal halides of Group 5 MX5 (M = Nb, Ta; X = F, Cl, Br) react with ketones and acetylacetones a...
The reactivity of NbCl5, NbF5 and TaCl5 with a selection of commercial imines was investigated for t...
The transition metals tantalum (Ta) and niobium (Nb), which are usually found together in nature, ha...
We have examined the interaction and substitution of electronegative ligands (F- and OH-) with perox...
The infrared spectra of the pentafluoroethyl halides have been investigated in the gaseous state wit...
The goal of this study was to develop new superacid systems based on fluorosulfuric acid, HSO₃F, (th...
The reactions of niobium and tantalum pentahalides, MX5, with dialkylureas (tetramethyl- and tetraet...
Research presented in this thesis falls into four areas. 1) Vibrational spectra of pentafluorides. 2...
A one-step metal oxidation/ligand redistribution reaction was developed to synthesize niobium(V) and...
The synthesis and the spectroscopic characterization of fluoride-alkoxides of niobium and tantalum i...
The synthesis and the spectroscopic characterization of fluoride-alkoxides of niobium and tantalum i...
The pentafluorides of niobium and tantalum reacted with benzophenone (Ph2CO), (2-diphenylphosphino)p...
Niobium and tantalum compounds lived for long time in the shadow of metal complexes of group 4, prob...
The reactions of various amines with vanadium and niobium pentafluoride have been studied. Pyridine...
The room temperature reactions of a series of 1,2-dialkoxyalkanes ROCH2CH(R')OR" with MX5 (M = Nb, T...
The metal halides of Group 5 MX5 (M = Nb, Ta; X = F, Cl, Br) react with ketones and acetylacetones a...
The reactivity of NbCl5, NbF5 and TaCl5 with a selection of commercial imines was investigated for t...
The transition metals tantalum (Ta) and niobium (Nb), which are usually found together in nature, ha...
We have examined the interaction and substitution of electronegative ligands (F- and OH-) with perox...
The infrared spectra of the pentafluoroethyl halides have been investigated in the gaseous state wit...
The goal of this study was to develop new superacid systems based on fluorosulfuric acid, HSO₃F, (th...
The reactions of niobium and tantalum pentahalides, MX5, with dialkylureas (tetramethyl- and tetraet...