4455-83-8Relevant academic research and scientific papers
1.4-addition of 1.1.2.2-tetrachlorodimethyldisilane to 1.4-diaza-1.3-dienes, synthesis and molecular structure of 1.6-disila-2.5-diaza-1.1.6.6-tetrachloro-1.6-dimethyl-2.5-di-p-tolyl-3.4-diphenyl-hexa-3-ene
Herzog,Roewer,Ziemer,Herrschaft
, p. 73 - 77 (1997)
Reaction of 1.1.2.2-tetrachlorodimethyldisilane (4) with 1.4-diazadienes like benzildianil (1), benzildi-p-tolil (2) and benzildi-p-anisil (3) leads to a 1.4-addition product of the disilane under cleavage of the Si-Si bond (1a, 2a, 3a). The structure of 2a was determined by X-ray crystallography (crystal data: monoclinic, P21/n, a = 14.661(4), b = 12.283(2), c = 17.564(5) A, β = 103.13°, Z = 4, R = 0.0585 for 5992 independent reflections). Surprisingly, 2a was found to be in the cis-configuration with almost C2 symmetry and a torsion angle of only 13°. Owing to statistical disorder, some bond lengths are not in the expected range.
Making Use of the Direct Process Residue: Synthesis of Bifunctional Monosilanes
Sturm, Alexander G.,Santowski, Tobias,Schweizer, Julia I.,Meyer, Lioba,Lewis, Kenrick M.,Felder, Thorsten,Auner, Norbert,Holthausen, Max C.
supporting information, p. 8499 - 8502 (2019/06/13)
The industrial production of monosilanes MenSiCl4?n (n=1–3) through the Müller–Rochow Direct Process generates disilanes MenSi2Cl6?n (n=2–6) as unwanted byproducts (“Direct Process Residue”, DPR) by the thousands of tons annually, large quantities of which are usually disposed of by incineration. Herein we report a surprisingly facile and highly effective protocol for conversion of the DPR: hydrogenation with complex metal hydrides followed by Si?Si bond cleavage with HCl/ether solutions gives (mostly bifunctional) monosilanes in excellent yields. Competing side reactions are efficiently suppressed by the appropriate choice of reaction conditions.
PROCESS FOR THE PRODUCTION OF ORGANOHYDRIDOCHLOROSILANES
-
Page/Page column 36; 37, (2019/04/16)
The invention relates to a process for the manufacture of organomonosilanes bearing both hydrogen and chlorine substituents at the silicon atom by subjecting a silane substrate comprising one or more silanes selected from organomonosilanes, organodisilanes and organocarbodisilanes, with the proviso that at least one of these silanes has at least one chlorine substituent at the silicon atom, to a redistribution reaction in the presence of a phosphane or amine acting as a redistribution catalyst.
CLEAVAGE OF METHYLDISILANES TO METHYLMONOSILANES
-
Page/Page column 27; 28, (2019/04/16)
The invention relates to a process for the manufacture of methylmonosilanes comprising the step of subjecting one or more methyldisilanes to the cleavage reaction of the silicon-silicon bond, and optionally a step of separating the resulting methylmonosilanes.
PROCESS FOR THE PRODUCTION OF ORGANOHYDRIDOCHLOROSILANES FROM HYDRIDOSILANES
-
Paragraph 44; 45, (2019/04/16)
The invention relates to a process for the manufacture of organomonosilanes bearing both hydrogen and chlorine substituents at the silicon atom by subjecting one or more organomonosilanes to the reaction with one or more di- or carbodisilanes in the presence of one or more compounds (C) acting as a redistribution catalyst, wherein at least one of the silanes has only hydrogen and organic residues at the silicon atoms.
PROCESS FOR THE PRODUCTION OF ORGANOHYDRIDOCHLOROSILANES
-
Page/Page column 37; 38, (2019/04/16)
The invention relates to a process for the manufacture of organomonosilanes, in particular, bearing both hydrogen and chlorine substituents at the silicon atom by subjecting a silane substrate comprising one or more organomonosilanes, with the proviso that at least one of these silanes has at least one chlorine substituent at the silicon atom, to the reaction with one or more metal hydrides selected from the group of an alkali metal hydride and an alkaline earth metal hydride in the presence of one or more compounds (C) acting as a redistribution catalyst.
