Describe the mechanism by which stereoregular polyolefins are formed in heterogeneous coordination polymerization. Complete the reaction scheme below, showing initiation, propagation and transfer to monomer steps in the synthesis of isotactic polypropylene. The catalyst, R-MLn, represents a crystalline organometallic compound, where M is a metal atom with a vacant d-orbital, R is an alkyl group directly attached to the metal atom; and Ln represents a halide ligand set. Assume all chain ends are terminated by transfer to monomer. R-MLn +

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Describe the mechanism by which stereoregular polyolefins are formed in
heterogeneous coordination polymerization. Complete the reaction scheme below,
showing initiation, propagation and transfer to monomer steps in the synthesis of
isotactic polypropylene. The catalyst, R-MLn, represents a crystalline organometallic
compound, where M is a metal atom with a vacant d-orbital, R is an alkyl group directly
attached to the metal atom; and Ln represents a halide ligand set. Assume all chain ends
are terminated by transfer to monomer.
R-MLn +
Transcribed Image Text:Describe the mechanism by which stereoregular polyolefins are formed in heterogeneous coordination polymerization. Complete the reaction scheme below, showing initiation, propagation and transfer to monomer steps in the synthesis of isotactic polypropylene. The catalyst, R-MLn, represents a crystalline organometallic compound, where M is a metal atom with a vacant d-orbital, R is an alkyl group directly attached to the metal atom; and Ln represents a halide ligand set. Assume all chain ends are terminated by transfer to monomer. R-MLn +
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