Dioxouranium(VI) complexes with potentially dibasic tridentate schiff base ligands. Characterization of the uranyl complexes of salicylaldehyde-2-hydroxyanil and its substituted derivatives

Summary Some 11, 23, and 12 uranyl complexes of salicylaldehyde-2-hydroxyanil (H₂SAP) and its substituted (3-methoxy-, 5-nitro-, 5-chloro- and 3,5-dichloro-) derivatives have been synthesized and characterized. The conductivity, i.r.,¹H n.m.r. and visible spectroscopic data allow discussion of the varying ligating behaviour of the potentially dibasic tridentate Schiff base ligands toward dioxouranium(VI).     

The Phosphorus-Selenium Bond in Triarylphosphine and 5-Phenyldibenzophosphole Selenide Systems

Abstract

It will be shown that 5-phenyldibenzophosphole is suitably described as a triarylphosphine compound. A study of the corresponding phosphole selenide and triarylphosphine selenide complexes leads to some interesting insight into the nature of the phosphorus-selenium bond. Aspects such as double-bond character, s-character and limiting bond length are discussed on the basis of NMR, IR and X-Ray crystallographic measurements. The relationships found are considered in view of both the steric and electronic properties of the parent phosphine compounds.     

Entnahme kleiner Gasproben

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