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Volumn 22, Issue 32, 2016, Pages 11196-11200

Nucleophilicity of Alkyl Zirconocene and Titanocene Precatalysts, and Kinetics of Activation by Carbenium Ions and by B(C6F5)3

Author keywords

catalyst activation; kinetics; metallocenes; nucleophilicity; polymerization catalysts

Indexed keywords

CATALYSTS; CHEMICAL ACTIVATION; ENZYME KINETICS; KINETICS; METALS; ORGANOMETALLICS; POLYMERIZATION; RATE CONSTANTS; ZIRCONIUM COMPOUNDS;

EID: 84979707867     PISSN: 09476539     EISSN: 15213765     Source Type: Journal    
DOI: 10.1002/chem.201602452     Document Type: Article
Times cited : (9)

References (65)
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    • To the best of our knowledge, only the ion pair symmetrization of metallocenium activated by tritylium ions have been reported, see:
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    • theoretical studies on the relative energies of formation of various zirconocenium ions by tritylium ions are also known
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    • For the electrophilicities of tritylium ions 3 and their use as reference electrophiles, see:
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    • The NMR data of difluorozirconocene [, H)=6.42 ppm,, F)=19.9 ppm,, C)=115.5 ppm, CD, Cl,] are consistent with the reported values, see, H)=6.42 ppm,, F)=16.8 ppm, CDCl
    • The NMR data of difluorozirconocene [δ(1H)=6.42 ppm, δ(19F)=19.9 ppm, δ(13C)=115.5 ppm, CD2Cl2] are consistent with the reported values, see: E. F. Murphy, P. Yu, S. Dietrich, H. W. Roesky, E. Parisini, M. Noltemeyer, J. Chem. Soc., Dalton Trans. 1996, 1983–1987 [δ(1H)=6.42 ppm, δ(19F)=16.8 ppm, CDCl3].
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    • The NMR data of BMe, H)=0.77 ppm,, B)=86.4 ppm, C)=14.9 ppm] are consistent with the reported values, see
    • 13C)=14.9 ppm] are consistent with the reported values, see:
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    • As the formation of homobinuclear alkylzirconium complexes is slow compared to the rate of alkyl abstraction from 1 by 2, and as 1 are used in large excess, the kinetics are not affected by the formation of these intermediates; see:
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    • For further discussions about the reactivity differences between methyl and benzyl zirconocenes, see
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    • Because of strong overlap of the UV/Vis absorbances of 1 a and 8of the ion pair [Cp, ZrMe], [MeB(C, F, k, could not be determined
    • 2 could not be determined.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.