| abstract |
ABSTRACT OF THE DISCLOSURE A process for the preparation of a halogen silane and an aromatic compound having at least one -C = O- or group, while simultaneously effecting cleavage of a siloxane by contacting a compound having at least one aromatic-ally bound mono and/or dihalogen methylene group or an aromatic compound having a mono-, di and or trihalogen methyl group of the formula (X = Cl, Br) wherein the aromatic moiety can be optionally otherwise substi-tuted, with a siloxane of the formula : wherein each R moiety is independently selected from the group consisting of halogen,alkyl, alkenyl and O-SiR3, wherein such R moiety is halogen, alkyl or alkenyl, wherein at least two of the R moieties can, together with the silicon atom to which they are attached,or a ring, at an elevated temperature in the presence of a catalytic amount of a metal or a metal compound, which metal is of the sub-group of elements or of the 5th principal group of the periodic system of the elements, together with a proton donor, or in the presence of a catalytic amount of an oxygen acid. |