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Volumn 6, Issue 11, 2016, Pages 7989-7993

Chain transfer to solvent in propene polymerization with Ti Cp-phosphinimide catalysts: Evidence for chain termination via Ti-C bond homolysis

Author keywords

2,1 insertions; Catalysis; DFT; Functionalized chain ends; Olefin polymerization; Ti(IV) Ti(III) oxidation state changes; Ti C homolysis

Indexed keywords

CATALYSIS; CATALYSTS; GROUP THEORY; ORGANIC POLYMERS; ORGANIC SOLVENTS; POLYMERIZATION; PROPYLENE;

EID: 85019130849     PISSN: None     EISSN: 21555435     Source Type: Journal    
DOI: 10.1021/acscatal.6b02738     Document Type: Letter
Times cited : (31)

References (38)
  • 5
    • 0033752160 scopus 로고    scopus 로고
    • (c) Coates, G. W. Chem. Rev. 2000, 100, 1223-1252.
    • (2000) Chem. Rev. , vol.100 , pp. 1223-1252
    • Coates, G.W.1
  • 19
    • 85019358671 scopus 로고    scopus 로고
    • note
    • Quenching of the polymerization with oxygen followed by standard workup did not produce any OH-labelled end groups (see ref 8), excluding that a significant amount of chains were transferred to aluminum.
  • 20
    • 85019350141 scopus 로고    scopus 로고
    • note
    • (a) Normally, not all precursor molecules are activated by MAO under catalytic conditions, even when a large excess of MAO is employed; 10%-60% active sites have been reported for Zr-metallocene catalysts in the literature but Ti-metallocenes and post-metallocenes are known for their instability and 5% appears to be a reasonable guess.
  • 23
    • 85019349421 scopus 로고    scopus 로고
    • note
    • +. However, σ-bond metathesis from a Ti-H species formed by BHE is inconsistent with the low amount of unsaturated chain ends.
  • 28
    • 85019355189 scopus 로고    scopus 로고
    • note
    • 4.
  • 29
    • 85019349730 scopus 로고    scopus 로고
    • note
    • (b) Level of theory M06-2X/cc-pVTZ//TPSSTPSS/6-31G+(2d,p); for more details on the DFT procedure see the Supporting Information.
  • 37
    • 85019376694 scopus 로고    scopus 로고
    • note
    • (a) DTBMP appears to play an important role in the reported solvent functionalization and this aspect is currently being studied in more detail.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.