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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
Author(s) -
Merbach A.,
Bünzli J. C.
Publication year - 1971
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19710540817
Subject(s) - chemistry , adduct , niobium , halide , tantalum , medicinal chemistry , base (topology) , equilibrium constant , inorganic chemistry , organic chemistry , mathematical analysis , mathematics
In view of a systematic study of the Lewis acidity of niobium (V) and tantalum (V) halides, NMR. methods for the determination of stability constants are discussed. In the case of rapid exchange chemical shifts are used to determine the relative amounts of adduct(s) and free base(s) in equilibrium. In the case of slow exchange the relative concentrations of the species are given by the peak areas.