Phenylene group-containing organosilanes and processes for the preparation thereof

Claim 2

A phenylene group-containing organosilane represented by the formula: ##STR16## where in each case all three possible isomers in relation to the position of the R 3 Si--R 1 substituents on the phenylene group can be present concurrently, whereby the bridge groups R 1 represents --CH 2 CH 2 -- or CH 3 CH< and may be identical or different, and the substituent R 2 represents chloride or a linear or branched alkoxy group with 1 to 3 carbon atoms and may be identical or different.

Claim 3

A process for the preparation of the compounds set forth in claim 1, comprising reacting a doubly unsaturated compound represented by the formula: ##STR17## in which all three possible isomers in relation to the position of the CH 2 ═CH substituents on the phenylene group can be present concurrently, in the presence of a hydrosilylation catalyst at a temperature of -78° to 200° C. and under a pressure corresponding to the sum of the partial pressures of the components of the reaction mixture at the specific temperature, with a stoichiometric or excess amount, in relation to the vinyl groups present, of trichlorosilane or trialkoxysilane of the formula: HSiR.sub.3.sup.2 ( 4) in which R 2 represents a linear or branched alkoxy group with 1-3 carbon atoms.

Claim 4

The process according to claim 2 further comprising carrying out the reaction in the presence of a compound of the formula: ##STR18## in which all three possible isomers in relation to the position of the H 2 C═CH< substituent and H 3 C--CH 2 substituent on the phenylene group can be present concurrently.

Claim 5

The process according to claim 2 further comprising recovering the product.

Claim 6

The process according to claim 4 further comprising purifying the product by distillation.

Claim 7

The process according to claim 5 wherein the distillation is under vacuum.

Claim 8

The process for the preparation of the compounds set forth in claim 1, in which R 3 in formula (1) represents a linear or branched alkoxy group with 1-3 carbon atoms, and comprising reacting a compound: ##STR19## in which R 2 is chloride, with stoichiometric or excess amounts of a linear or branched alcohol with 1-3 carbon atoms, at temperatures of -20° C. to 200° C. until at least essentially total liberation of the theoretically possible amount of hydrogen chloride gas occurs, and any excess alcohol is removed from the product.

Claim 9

The process according to claim 7 wherein the product is purified by distillation.

Claim 10

The process according to claim 8 wherein the distillation is in vacuum.