Combinatorial Approach to the Catalytic Hydrosilylation of Styrene Derivatives: Catalyst Systems Composed of Organoiron(0) or (II) Precursors and Isocyanides
(COT)2Fe and the open ferrocenes (MPDE)2Fe (MPDE = η5-3-methylpentadienyl) and (DMPDE)2Fe (DMPDE = η5-2,4-dimethylpentadienyl) were found to function as catalyst precursors for the hydrosilylation of alkenes in the presence of auxiliary ligands. Screening trials determined that the optimal catalyst system was composed of (COT)2Fe and adamantyl isocyanide, allowing the selective hydrosilylation of styrene
An optical matching oil that is immune to timewise variations in its refractive index, that undergoes little increase in viscosity below room temperature, and that also resists crystallization below room temperature. The optical matching oil is based on an organosilicon compound with the following general formula ##STR1## wherein R is selected from the group consisting of methyl, vinyl, and 2-methylphenethyl with the proviso that at least one R group is the 2-methylphenethyl group.
A mixture of an iron or a cobalt carboxylate and an isocyanide ligand catalyzed the hydrosilylation of alkenes with hydrosiloxanes with high efficiency (TON >10(3)) and high selectivity. The Fecatalyst showed excellent activity for hydrosilylation of styrene derivatives, whereas the Co catalyst was widely effective in reaction of alkenes. Both of them catalyzed the reaction with allylic ethers. Chemical
铁或钴羧酸盐和异氰化物配体的混合物催化烯烃与氢硅氧烷的氢化硅烷化,具有高效率 (TON > 10(3)) 和高选择性。Fe 催化剂对苯乙烯衍生物的氢化硅烷化显示出优异的活性,而 Co 催化剂在烯烃的反应中广泛有效。它们都催化与烯丙基醚的反应。有机硅的化学改性和交联是通过选择正确的催化剂和反应条件来实现的。