Migration Insertion Polymerization (MIP) of Cyclopentadienyldicarbonyldiphenylphosphinopropyliron
(FpP): A New Concept for Main Chain Metal-Containing Polymers (MCPs)
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Abstract
We
report a conceptually new polymerization technique termed migration
insertion polymerization (MIP) for main chain metal-containing polymer
(MCP) synthesis. Cyclopentadienyldicarbonyldiphenylphosphinopropyliron
(FpP) is synthesized and polymerized via MIP, resulting in air stable
poly(cyclopentadienylcarbonyldiphenylphosphinobutanoyliron)
(PFpP) displaying narrow molecular weight distribution. The backbone
of PFpP contains asymmetric iron units connected by both phosphine
coordination and Fe-acyl bonds, which is representative of a new type
of polymer. Furthermore, PFpP is tested to be soluble in a wide range
of organic solvents and shown to possess reactive Fp end groups. PFpP
amphiphiles have therefore been prepared via an end group migration
insertion reaction in the presence of oligoethylene phosphine