Organophosphazenes. 17. The Synthesis of Trimethylsilylacetylene and Terminal Acetylene Derivatives of Hexfluorocyclotriphosphazene.
VERMONT UNIV BURLINGTON DEPT OF CHEMISTRY
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The reactions of lithio trimethylsilylacetylene, LiCCSiMe3, with hexafluorocyclotriphosphazene, N3P3F6, lead to the new alkynphosphazenes N3P3F6, lead to the new alkynphosphazenes N3P3F6-nCSCiMe3n n1,2. Both the geminal and non-geminal isomers are observed in the 31P and 19F n.m.r. spectra. A reinvestigation of the reaction of lithio phenylacetylene, LiCCPh, with N3P3F6 showed that, at the stage of bis substitution, in addition to the previously reported major product, gem-N3P3F4CC Ph2, small amounts of the non-geminal N3P3F4CCPh2 isomers are formed. The reactions of N3P3F6-nCCSiMe3n n1,2 with potassium fluoride in anhydrous ethanol leads to the terminal acetylene derivatives, N3P3F4-n OC2H52CCHn n1,2.
- Polymer Chemistry