Journal ArticleDOI
Composés d'addition des halogénures de niobium(V) et de tantale(V) IV. Stabilité relative des composés de chlorures avec quelques nitriles
A. Merbach,J. C. Bünzli +1 more
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TLDR
The relative stability constants of the adducts of MCl5 (M Nb, Ta) with acetonitrile, halogenoacetonitriles, pivalonitrile and acrylonitrile were determined in dilute solutions by NMR methods as mentioned in this paper.Abstract:
The relative stability constants of the adducts of MCl5 (M Nb, Ta) with acetonitrile, halogenoacetonitriles, pivalonitrile, acrylonitrile and benzonitriles are determined in dilute solutions by NMR. methods. The stability of the adducts is controlled by inductive factors. Chemical shifts and analysis of the new compounds are reported.read more
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The coordination chemistry of acrylonitrile
TL;DR: In this article, the structure and possible modes of coordination of acrylonitrile adducts are discussed, including the type (a) complexes, bonded through the nitrile nitrogen and type (b) and (c) complexes containing bridging Iigands: the molybdenum(0) complex Mo,(CO),(PBu,),(~-CH,CHCN), and the copper(I) complex Cu,Cl,(Ir-CH-CHCN)Ni[P(OR],
Journal ArticleDOI
Composés d'addition des halogénures de niobium(V) et de tantale(V). V. Stabilité relative des composés des chlorures avec quelques oxydes et sulfures organiques†‡
A. Merbach,J. C. Bünzli +1 more
TL;DR: In this article, the relative basicity of each donor atom in dioxane, thioxane and dithiane is calculated and discussed and the steric factors are more important for the ether and sulfide adducts: MCl5 · Me2X is more stable than the corresponding MCl 5 · Et2X (M = Nb, Ta; X = O, S).
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Photoelectron spectra of halogeno-3-propynes (XCH2CCH) and halogenomethylcyanides (XCH2CN) and comments on the attribution of f☆
TL;DR: The photoelectron spectra of halogeno-3-propynes and halogenomethylcyanides (F, Cl, Br) have been determined in this paper.
Journal ArticleDOI
Niobium-93 nuclear magnetic resonance studies of the solvolysis of NbCl5 by alcohols
G. Robert Lee,Joe A. Crayston +1 more
TL;DR: In this paper, the substitution products NbCl5−x(OMe)x formed by the stepwise substitution of NbCL5 by MeOH in non-coordinating solvents were identified.
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Adducts of antimony(V) pentachloride with neutral Lewis bases. Part I. Structure and stability: a vibrational and NMR study
TL;DR: In this article, a large number of SbCl5·L adducts were synthesized (L = RCN, R3−nR′nPO, ethers and various other oxygen donors).
References
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Journal ArticleDOI
Étude structurale de nbcl5 · NCR et de Tacl5 · NCR (R = Cl, CH3) par spectroscopie infrarouge et raman
J. Maccordick,G. Kaufmann +1 more
TL;DR: In this paper, spectres de vibration IR et Raman sont presentes pour les composes d'addition M v Cl 5 · NCCl and M v CL 5 · CH 3 CN (M = Nb, Ta) dans le domaine 100-600 cm −1.
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Composés d'addition des halogénures de niobium (V) et de tantale(V): III. Détermination de constantes de stabilité par résonance magnétique nucléaire
A. Merbach,J. C. Bünzli +1 more
TL;DR: In this paper, NMR methods for the determination of stability constants of niobium and tantalum halides have been discussed in view of a systematic study of the Lewis acidity of the halides.