Reactions of Silicon Atoms with Methane and Silane in Solid Argon: A Matrix-Spectroscopic Study

Abstract

A way into normality: By using [Cp*Ru] complexes with bisphosphite or bisphosphine ligands, selective hydroformylation of propene and 1‐decene to homologated normal aldehydes was accomplished with the highest levels of activity and selectivity ever reported for ruthenium catalyst systems (see scheme). The reaction mechanism was investigated using stoichiometric amounts of [Cp*Ru(Xantphos)H] and [D2]‐1‐decene.

Infrared spectroscopic studies of hydrogenated silicon clusters

“…2, Table 4). It is important to compare our findings with an earlier study of Maier et al (2002). Here, the authors observed the strongest absorption at 904.3 cm −1 close to our observed fundamental at 898 cm −1 ; two weak silicon-hydrogen stretching modes at 2180.2 cm −1 and 2207.8 cm −1 are obscured in our silane matrix.…”

“…Comparing their data of 861.4 cm −1 (hydrogen in neon) and 634.2 cm −1 (deuterium in neon), we suggest that they observed the H 3 SiSiH(X 1 A') structure. We would like to point out that Maier et al (2002) observed this isomer, too. Their strongest absorptions at 860.6 cm −1 and 642.4 cm −1 are very close to our experimentally observed value of 867 cm −1 and 635 cm −1 .…”

Toward triplet disilavinylidenes: A Hammett electronic survey for substituent effects on singlet‐triplet energy gaps of silylenes by DFT

“…Disilavinylidene can originate from disilene. The simplest is H 2 Si = Si: that is derived from H 2 Si = Si 2 H . The electronic features of anionic disilavinylidene were investigated, at HF levels of theory .…”

Infrared Spectra and Structures of SiH2–(CH2)2 and CH2CH−SiH3 Intermediates Prepared in Reactions of Laser‐ablated Silicon Atoms with Ethane

“…3 Maier et al have also observed CH 3 -SiX and CH 2 SiHX in reactions of Si with methyl halides. 4 Raabe et al have succeeded in preparation of CH 3 -SiH CH 2 by photolysis of (CH 3 ) 2 Si(N 3 ) 2 , and Drahnak et al have provided the same product and its dimer via photoisomerization of (CH 3 ) 2 Si, which was produced by ultraviolet (UV) photolysis of [(CH 3 ) 2 Si] 6 . 5 We have reacted laser-ablated Si atoms with dihalomethanes and formed singlet methylidenes (CH 2 SiX 2 ), and tri-and tetrahalomethanes which produced triplet methylidynes (HC-SiX 3 and XC-SiX 3 ).…”

“…These Si complexes are similar to the primary products in the previous studies of group 4 metals, in line with the previous results that s 2 p 2 and s 2 d 2 electronic configurations yield similar products. [1][2][3][4][5][6][7]9,11 The relatively long C-C bond in the cyclic Si product reflects the structural strain, and the short C-Si and C-C bonds of CH 3 CH SiH 2 and CH 2 CH-SiH 3 show that they are true double bonds in line with the natural bond orders.…”