New method for the synthesis of cage and polymeric metallosiloxanes

Cage organometallosiloxanes were synthesized according to a new procedure using monomeric organoalkoxysilanes as the starting compounds. The latter were subjected to hydrolysis immediately before the exchange reaction of sodium silanolate with metal halides. Difficultly accessible metallovinylsiloxanes, metallomethylsiloxanes, and metallosiloxanes containing a functional group in the organic radical at the silicon atom can be readily prepared according to the method proposed. Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 12, pp. 2530–2532, December, 1998.     

Reactions of cage-like copper/sodium organosiloxanes with CuCl2

The reactions of cage-like copper/sodium organosiloxanes with CuCl₂ were studied. Cage-like copper organosiloxanes containing the Si—O—Cu—Cl group were synthesized for the first time.     

Oligomerization of organochlorosilanes in the acetylacetone—carbamide system

Condensation of acetylacetone with carbamide in nonpolar media (benzene, toluene) is initiated by organochlorosilanes. The reaction rapidly occurs under mild conditions to give oligosiloxanes and 4,6-dimethylpyrimidin-2(1H)-one hydrochloride. The conversion of chlorosilanes and the yields of oligosiloxanes are nearly ～100%.     

Cascade cocondensation of trifunctional chloro- and alkoxysilanes RSiX3 in nonaqueous media

Russian Chemical Bulletin - The hydrolytic copolycondensation (HPC) of trifunctional monomers RSiX3 (R = Ph, Me; X are hydrolyzable RO or Cl groups) in nonaqueous organic solvents (toluene,...     

Cascade synthesis of polyorganosiloxanes in an organodichlorosilane—acetone—carbamide non-aqueous system

Russian Chemical Bulletin - Нydrolytic polycondensation of organochlorosilanes (OCS) RR´SiCl2, where R,R´= Me, Et, C2H3, and H, in an acetone—carbamide non-aqueous system was...     

Alkoxysilanes and disiloxanes comprising mesoionic sydnon-4-yl heterocyclic substituent

Russian Chemical Bulletin -     

Reactions of cage metal siloxanes with functionalized organochlorosilanes

The reactions of [(2-acetoxyetoxy)methyl]dimethylchlorosilane and 1-acetoxy-2-(dimethylchlorosilylmethoxy)benzene with the cage phenylcopper and phenylmanganese siloxanes leads to the cleavage of the M—O—Si bond to give metal chlorides and six-unit cyclosiloxanes with an acetoxy group in the organic substituent at the silicon atom. Methanolysis of these acetoxy derivatives does not affect the ring structure and affords the corresponding polyhydric alcohols.