Supported organometallic complexes. Part XX. Hydroformylation of olefins with rhodium(I) hybrid catalysts

Preparation and use of hybrid organic–inorganic catalysts

“…The hydroformylation of olefins to aldehydes is one of the most important homogeneously catalyzed reactions in modern industrial chemistry (140,141). The atom efficiency of the process is 100%, and the selectivity towards the valuable linear aldehydes can be ensured by the use of Rh-triethylphosphane catalysts.…”

Synthesis, characterization, crystal structure and chemical behavior of [1,1-bis(diphenylphosphinomethyl)ethene]ruthenium(II) complex toward primary alkylamine addition

“…Mixed diamine(phosphine)ruthenium(II) complexes have received much attention in recent years due to their remarkable performance in selective hydrogenation [11][12][13][14] and asymmetric hydrogenation of unsaturated carbonyl compounds [25][26][27][28][29][30][31][32]. Complexes such as 5 are very important in interphase chemistry.…”

Preparation of graphite/nano-SiC composites by co-pyrolysis of a petroleum residue with phenylsilanes

“…This increase in volatile matter can be caused by oxidation of the samples during the preparation. In fact the oxidation of silanes, polysilanes and polycarbosilanes occurs easily at room temperature, forming Si-O structures (Si-OH, Si-OPh, Si-O-R, and Si-O-Si) [25][26][27][28]. The thermal degradation of species such as polysiloxanes leads to the formation of intermediate species of hydrogenated oxycarbides at temperatures lower than 800 8C, which transform into amorphous Si-O-C and finally to b-SiC and SiO 2 above 1600 8C [29].…”

“…However, in the present system the formation of SiC is complete, with the evolution of SiO and CO, the later being formed as a result of a reaction of Si-O bonds with the excess of carbon and the formation of Si-C bonds at temperatures above 1200 8C [25,26]. Analysis of the samples by FTIR reveals the existence of two bands at wave number 1100 and 810 cm À1 , corresponding to the Si-O bond modes (although the former can also be assigned to the Si-Phe stretching), indicative of the oxidation of the silanes [26][27][28][29]. This oxidation can also be observed by 29 Si NMR (Fig.…”