5654-07-9Relevant articles and documents
Synthesis of multinuclear Rh(I) complexes bearing triazolylidenes and their application in C-C and c-Si bond forming reactions
Mendoza-Espinosa, Daniel,Rendón-Nava, David,Vásquez-Pérez, Jose M.,Sandoval-Chávez, Cesar I.,Alvarez-Hernández, Alejandro
, p. 3961 - 3971 (2020/12/01)
Multidentate carbene ligands are valuable frameworks for the preparation of carbene complexes displaying higher nuclearity. In the present work, we report the synthesis of a series of mono- to tetra-[Rh(COD)I] complexes (3a- d) supported by mesoionic triazol-5-ylidenes. The general synthetic procedure involves the one step reaction of the appropriate triazolium (2a-d) salt in the presence of KHMDS and stoiquiometric amounts of the rhodium(I) precursor. Treatment of complexes 3a-d with an excess of carbon monoxide allows for the quantitative preparation of complexes 4a-d featuring a [Rh(CO)2I] fragment used for the detemination of the donor properties of the new triazolylidene ligands. All complexes have been fully characterized by means of 1H and 13C NMR spectroscopy, melting point, elemental analysis, and in the case of complex 3a, by X-ray crystallography. Comparison of the catalytic activity of the new rhodium complexes in C-C and C-Si bond forming processes demonstrate the enhanced performance of the tetranuclear species suggesting the possibility of strong cooperative effects in these multinuclear complexes.
Method for synthesizing trimethyl(1-(trimethylsilyl)vinyl)silane
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Paragraph 0023-0026; 0027-0030; 0031-0038; 0039-0042, (2018/06/15)
A method for synthesizing trimethyl(1-(trimethylsilyl)vinyl)silane belongs to the technical field of battery additives. The method comprises the following steps: 1, adding lithium methide to tris(trimethylsilyl)methane used as a raw material, introducing a formaldehyde gas, and carrying out a reaction at a temperature of 0-50 DEG C under a 1-5 kg formaldehyde pressure to obtain crude trimethyl(1-(trimethylsilyl)vinyl)silane; and 2, adding the crude trimethyl(1-(trimethylsilyl)vinyl)silane into a polymerization inhibitor, and carrying out molecular distillation at a temperature of 50-85 DEG C under a vacuum degree of 0.5-0.7 Pa to obtain refined trimethyl(1-(trimethylsilyl)vinyl)silane. The method has the advantages of simplicity, mild and stable reaction conditions, and high yield and highpurity of the product.
A new selective approach to 1,1-bis(silyl)-2-arylethenes and 1,1-bis(silyl)-1,3-butadienes via sequential silylative coupling-heck coupling reactions
Pawluc, Piotr,Hreczycho, Grzegorz,Marciniec, Bogdan
, p. 8676 - 8679 (2007/10/03)
A novel selective route to 1,1-bis(silyl)-1-alkenes has been developed. Sequential one-pot silylative coupling exo-cyclization of 1,2- bis(dimethylvinylsiloxy)ethane followed by the reaction with Grignard reagents leads to the desired 1,1-bis(silyl)ethene