Method of making organopolysiloxanes

A method of making organopolysiloxane having the general formula R.degree. (R.sup.1.sub.2 SiO).sub.p SiR.sup.1.sub.2 R.degree. , wherein R.degree. is selected from a hydrogen atom, a hydroxyl group, a hydrocarbon group having from 1 to 18 carbon atoms, a substituted hydrocarbon group having from 1 to 18 carbon atoms or a hydrocarbonoxy group having up to 18 carbon atoms, R1 denotes the same groups as R.degree. except for hydroxyl groups and p is an integer, which comprises contacting one or more organosilicon compounds of the general formula HO---(R.sup.1.sub.2 SiO).sub.q --H, wherein R1 is as defined above, q denotes an integer which is substantially smaller than p with a phosphonitrile halide which has the general formula AB, wherein A is a phosphonitrile halide cation of the general formula {X(PX.sub.2 .dbd.N).sub.n PX.sub.3 }+, wherein X denotes a halide atom and n has a value of from 1 to 8, and B is an anion derived from a Lewis acid not containing a P atom.

A method of making organopolysiloxanes having the general formula R.sup.1 (R.sup.1.sub.2 SiO).sub.p SiR.sup.1.sub.2 R.sup.1, wherein R1 denotes a hydrogen atom, a hydrocarbon group having from 1 to 18 carbon atoms or a hydrocarbonoxy group having up to 18 carbon atoms, and p is an integer, which comprises contacting one or more organosilicon compounds of the general formula R.sup.1 (R.sup.1.sub.2 SiO).sub.q SiR.sup.1.sub.3 and/or organosilicon compounds of the general formula (R.sup.1.sub.2 SiO).sub.S, wherein R1 is as defined above and s denotes an integer with a value of from 3 to about 10 and q denotes an integer which is substantially smaller than p with a phosphonitrile halide which has the general formula AB, wherein A is a phosphonitrile halide cation of the general formula {X(PX.sub.2 .dbd.N).sub.n PX.sub.3 }+, wherein X denotes a halide atom and n has a value of from 1 to 8, and B is an anion derived from a Lewis acid not containing a P atom.