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Volumn 28, Issue 15, 2009, Pages 4452-4463

Nickel(II) and Palladium(II) Polymerization catalysts bearing a fluorinated cyclophane ligand: stabilization of the reactive intermediate

Author keywords

[No Author keywords available]

Indexed keywords

AXIAL DIRECTION; AXIAL SITES; CATALYST RESTING STATE; CATALYTIC BEHAVIOR; CYCLOPHANES; DIIMINES; FEED PRESSURE; FLUORINE ATOMS; HIGH MOLECULAR WEIGHT; LONE PAIR; LOW BRANCHING; METAL CENTERS; NMR ANALYSIS; OLEFIN POLYMERIZATION CATALYSTS; POLYMER SIZES; POLYMERIZATION ACTIVITY; POLYMERIZATION CATALYSTS; REACTIVE INTERMEDIATE; SYNTHESIS AND CHARACTERIZATION; THERMAL STABILITY;

EID: 68149157235     PISSN: 02767333     EISSN: None     Source Type: Journal    
DOI: 10.1021/om900302r     Document Type: Article
Times cited : (135)

References (41)
  • 1
    • 68149154903 scopus 로고    scopus 로고
    • This paper has been adapted in part from the following thesis, Popeney, C. S. Ph.D. Dissertation, University of California, Irvine, 2008
    • This paper has been adapted in part from the following thesis : Popeney, C. S. Ph.D. Dissertation, University of California, Irvine, 2008.
  • 11
    • 68149153172 scopus 로고    scopus 로고
    • Masters thesis, Chapter 2, University of California, Irvine
    • Salo, E. V. Masters thesis, Chapter 2, University of California, Irvine, 2005.
    • (2005)
    • Salo, E.V.1
  • 19
    • 68149097020 scopus 로고    scopus 로고
    • Moody, L. S.; Mackenzie, P. B.; Killian, C. M.; Lavoie, G. G.; Ponasik, J. A., Jr.; Barrett, A. G.; Smith, T. W.; Pearson, J. C. WO 00/ 50470, 2002.
    • Moody, L. S.; Mackenzie, P. B.; Killian, C. M.; Lavoie, G. G.; Ponasik, J. A., Jr.; Barrett, A. G.; Smith, T. W.; Pearson, J. C. WO 00/ 50470, 2002.
  • 20
    • 68149112597 scopus 로고    scopus 로고
    • Crystals of 4 were grown over several days by slow vapor diffusion of n-pentane into a dichloromethane solution of the complex (15 mg/mL, Crystallography data for 4: C83H39BF28N 2NiO2CH2Cl2: red plate, triclimc, Mr, 1782.61,P1̄ a= 12.010(3)Å, b, 14.126(4)Å, c, 22.928(6)Å, a= 103.802(4)°, β= 101.778(4)°, y, 100.135(4)°, V=3593.1 (16) Å3, Z=2, T= 100(2) K, λ=0.71073 Å The asymmetric unit consists of one anion, one molecule of the recrystallization solvent, CH2Cl 2, and two half-cations residing on inversion centers; of necessity, while the outer macrocyclic ring possesses the crystallographically required symmetry, the inner Ni coordination sphere does not and is consequentially fully disordered, but easily modeled based on the planar geometry about Ni. R 1 =0
    • 2=0.1567 for 12 613 independent reflections. CCDC702264 contains the supplementary crystallographic data for this paper. These data can be obtained free of charge via www.ccdc.cam.ac.uk/ conts/retrieving.html (or from the Cambridge Crystallographic Data Centre, 12 Union Road, Cambridge CB21EZ, UK; fax: ( + 44)1223-336033; or deposit@ccdc.cam.ac.uk).
  • 29
    • 68149153171 scopus 로고    scopus 로고
    • Acetonitrile adduct 7 was synthesized along with an inseparable unidentified minor product, 7'. This was additional motivation for the synthesis of arylnitrile 8, which could be isolated in high purity. Despite the impurity, GPC traces of polymer produced by 7 were monomodal, indicating it was not active toward polymerization.
    • Acetonitrile adduct 7 was synthesized along with an inseparable unidentified minor product, 7'. This was additional motivation for the synthesis of arylnitrile 8, which could be isolated in high purity. Despite the impurity, GPC traces of polymer produced by 7 were monomodal, indicating it was not active toward polymerization.
  • 30
    • 68149175247 scopus 로고    scopus 로고
    • The low molecular weight of polymer produced by the cyclophane Pd(II) catalysts is inconsistent with evidence that suggests a reduction in associative chain transfer rates (see refs 6, 8). Instead, an additional chain transfer mechanism, possibly dissociative, may operate preferentially . Popeney, C. S.; Levins, C. M.; Guan, Z. Manuscript in preparation.
    • The low molecular weight of polymer produced by the cyclophane Pd(II) catalysts is inconsistent with evidence that suggests a reduction in associative chain transfer rates (see refs 6, 8). Instead, an additional chain transfer mechanism, possibly dissociative, may operate preferentially . Popeney, C. S.; Levins, C. M.; Guan, Z. Manuscript in preparation.
  • 37
    • 68149132965 scopus 로고    scopus 로고
    • Yakelis, N. A.; Bergman, R. G. Organometallies 2005, 24, 35793581.
    • Yakelis, N. A.; Bergman, R. G. Organometallies 2005, 24, 35793581.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.