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Insoluble poly(akylarylphosphine)siloxanes and their application as supports for catalytic transition‐metal complexes
Author(s) -
Ejike E. N.,
Parish R. V.,
Jideonwo A.
Publication year - 1989
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1989.070380208
Subject(s) - hexamethyldisiloxane , catalysis , polymer chemistry , triethoxysilane , phosphine , transition metal , chemistry , rhodium , iridium , diphenylphosphine , metal , silylation , organic chemistry , physics , plasma , quantum mechanics
Abstract Light induced addition of diphenylphosphine (DPP) to methylvinylcyclotetrasiloxane (MVS) yielded poly(2‐diphenylphosphinoethyl) cyclotetrasiloxane (DPPS). Similar treatment of allyldiphenylphosphine (ADPP) with linear poly(methylhydrogenosiloxane)‐co‐hexamethyldisiloxane (PMS) led to formation of poly(3‐diphenylphosphinopropyl)methylsiloxane‐co‐hexamethyldisiloxane (PPMS). DPPS and PPMS were condensed by acid treatment to give insoluble rubbery phosphine bearing materials P 1 and P 2 , respectively. Iridium and rhodium complexes were immobilized on P 1 and P 2 . The ability of a high molecular weight substrate (PMS) to migrate to active catalytic centers within support matrix was examined. The effect of varying metal: phosphine ratio and total percentage metal on the support were examined during catalysis of O‐silylation of ethanol with PMS and triethoxysilane (TES).