42557-89-1Relevant academic research and scientific papers
COMPLEX FORMATION OF D- AND F-ELEMENTS WITH SULPHUR ORGANIC COMPOUNDS IN EXTRAKTION EQUILIBRIA
Murinov, Yu. I.
, p. 65 - 110 (2007/10/02)
The regularities in reactivities of some mono- and polydentate organosulphur compounds have been established for complex formation with metal salts in extraction-sorption equilibria.Their reactivities have been shown to depend upon the spatial arrangement of donor centres in an extractant.New classes of polydentate extractants (keto sulphides, amino-sulphides, keto-aminosulphides) have been suggested. Chemical properties of coordinative extractions and sorptions have been investigated for d- and f-elements to be the most intrinsic for the above mentioned class.The keto group has been found to affect the electron density of sulphur in the keto sulphides, thus preventing undesirable redox reactions between an extractant and the isolated metal ion.The coordination character and properties of extracted and sorbated complexes of d- and f-elements with organosulphur compounds have been determined. The donor centres of polydentate organosulphur ligands in the process of complex formation with d- and f-elements have been detected by IR-, ESR-, PMR-, and Raman spectral analyses.
REACTIONS OF α-HETEROATOM-SUBSTITUTED ETHERS AND SULFIDES WITH SILYL ENOL ETHERS. CHEMOSELECTIVITY IN THE CLEAVAGE OF HETEROATOM-CARBON BONDS BY IODOTRIMETHYLSILANE AND TRIMETHYLSILYL TRIFLUOROMETHANESULFONATE
Hosomi, Akira,Sakata, Yasuyuki,Sakurai, Hideki
, p. 405 - 408 (2007/10/02)
Reactions of α-heteroatom substituted ethers and related compounds (R1R2CXY; X, Y = RO, RS and Cl) with silyl enol ethers and ketene silyl acetals took place in the presence of iodotrimethylsilane (Ia) and trimethylsilyl triflate (Ib) as a catalyst and factors influencing the activation of the heteroatom by I were examined.
