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Adducts of niobium(V) and tantalum(V) halides. XIV . Structure and relative stability of the adducts with some phosphoryl compounds
Author(s) -
Favez Christian M. P.,
Rollier Henri,
Merbach André E.
Publication year - 1976
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.19760590712
Subject(s) - chemistry , adduct , halide , tantalum , octahedron , niobium , monomer , ligand (biochemistry) , chloroform , medicinal chemistry , stereochemistry , crystallography , inorganic chemistry , crystal structure , organic chemistry , biochemistry , receptor , polymer
The adducts of niobium(V) and tantalum(V) halides with some phosphoryl compounds have been studied in chloroform solution by 1 H‐ and 19 F‐FT‐NMR. spectroscopy. These octahedral adducts of general formula MX 5 · L (M = Nb, Ta; X = F, Cl, Br; L = phosphoryl ligand) are monomeric and neutral. Their relative stability constants have been determined at −60°. The stabilities are controlled by electronic effects of substituents on the phosphoryl group.