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The adducts of niobium(V) and tantalum(V) halides with some phosphoryl compounds have been studied in chloroform solution by 1H- and 19F-FT-NMR. spectroscopy. These octahedral adducts of general formula MX5 · 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. 相似文献
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Liu JC Ishizuka T Osuka A Furuta H 《Chemical communications (Cambridge, England)》2003,(15):1908-1909
The change of the axial bond length in the antimony(V) N-confused tetraphenylporphyrin dibromide complex was demonstrated by protonation and confirmed from X-ray single crystal analyses. 相似文献