67267-89-4Relevant academic research and scientific papers
Catalytic Barbier-type reactions of lactones and esters mediated by the Mischmetall/SmI2(cat.) system or the Mischmetall/[SmI2/NiI2(cat'.)](cat.) system
Lannou, Marie-Isabelle,Hélion, Florence,Namy, Jean-Louis
, p. 8007 - 8010 (2002)
Barbier-type reactions using SmI2 in catalytic amounts together with Mischmetall as a coreductant, involving lactones or esters and a variety of organic halides (allylic, benzylic and alkyl), have been performed. With alkyl halides and five- or six-membered ring lactones, catalytic quantities of nickel diiodide (with respect to SmI2) must be added to achieve reactions. Thus, a 'two-stage catalysis' is carried out. Unexpectedly, it was found that with esters or an unstrained lactone the Mischmetall/SmI2 (catalytic) system is more reactive than samarium diiodide in stoichiometric amounts. Tentative interpretations of the catalytic role of NiI2 are proposed.
Some uses of mischmetall in organic synthesis
Lannou, Marie-Isabelle,Hélion, Florence,Namy, Jean-Louis
, p. 10551 - 10565 (2007/10/03)
Mischmetall, an alloy of the light lanthanides, has been used in a variety of organic reactions, either as a coreductant in samarium(II)-mediated reactions (Barbier and Grignard-type reactions, pinacolic coupling reactions) or as the promoter of Reformatsky-type reactions. It has been also employed as the starting material for easy syntheses of lanthanide trihalides, the reactivity of which has been explored in Imamoto and Luche-Fukuzawa reactions and in Mukaiyama aldol reactions.
COLLOIDAL PROPERTIES OF SODIUM 4-BENZENESULFONATE WITH REFERENCE TO PETROLEUM RECOVERY
Mikulski, R.,Czerniawski, M.,Kampert, M.,Zielinska, J.
, p. 165 - 173 (2007/10/02)
Surface tension, conductivity and light scattering measurements at various temperatures have been used to characterize aqueous solutions of the 4-benzene-sulfonate (PhC15S-Na) micelles with increasing concentration.On the basis of the results obtained the values of critical micelle concentration, the shape and size of micelles, the number of charges on their surface and the values of thermodynamic functions have been determined.
