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Volumn 39, Issue 25, 2006, Pages 8567-8573

Living polymerization of phenylacetylene with tetrafluorobenzobarrelene ligand-containing rhodium catalyst systems featuring the synthesis of high molecular weight polymer

Author keywords

[No Author keywords available]

Indexed keywords

CATALYSTS; LIVING POLYMERIZATION; MOLECULAR STRUCTURE; MOLECULAR WEIGHT; MOLECULAR WEIGHT DISTRIBUTION; SYNTHESIS (CHEMICAL); TERNARY SYSTEMS;

EID: 33846140146     PISSN: 00249297     EISSN: None     Source Type: Journal    
DOI: 10.1021/ma062075e     Document Type: Article
Times cited : (57)

References (80)
  • 1
    • 17144368795 scopus 로고    scopus 로고
    • For reviews, see: a
    • For reviews, see: (a) Buchmeiser, M. R. Adv. Polym. Sci. 2005, 176, 89.
    • (2005) Adv. Polym. Sci , vol.176 , pp. 89
    • Buchmeiser, M.R.1
  • 3
    • 84986885212 scopus 로고    scopus 로고
    • Grubbs, R. H, Ed, Wiley-VCH: Weinheim, Germany
    • (c) Masuda, T.; Sanda, F. In Handbook of Metathesis; Grubbs, R. H., Ed.; Wiley-VCH: Weinheim, Germany, 2003; Vol. 3, p 375.
    • (2003) Handbook of Metathesis , vol.3 , pp. 375
    • Masuda, T.1    Sanda, F.2
  • 10
    • 0037019009 scopus 로고    scopus 로고
    • For recent papers of group 10 catalysts, see: a
    • For recent papers of group 10 catalysts, see: (a) Li, K.; Wei, G.; Pollack, S. K. Macromolecules 2002, 35, 4573.
    • (2002) Macromolecules , vol.35 , pp. 4573
    • Li, K.1    Wei, G.2    Pollack, S.K.3
  • 70
    • 33745801309 scopus 로고    scopus 로고
    • For recent papers regarding transition-metal-catalyzed stereospecific living polymerization, see: a
    • For recent papers regarding transition-metal-catalyzed stereospecific living polymerization, see: (a) Beckerle, K.; Manivannan, R.; Spaniol, T. P.; Okuda, J. Organometallics 2006, 25, 3019.
    • (2006) Organometallics , vol.25 , pp. 3019
    • Beckerle, K.1    Manivannan, R.2    Spaniol, T.P.3    Okuda, J.4
  • 76
    • 33846143994 scopus 로고    scopus 로고
    • 18b
    • 18b
  • 79
    • 33846136261 scopus 로고    scopus 로고
    • p) probably due to different steric environments in the initiating and propagating species. The trisubstituted vinylrhodium moiety in the initiating species is sterically more demanding than the disubstituted vinylrhodium moiety in the propagating species. Hence, coordination of PA to the propagating species should be more facile than to the initiating species, causing broadening of MWD in the initial stage of polymerization (see Chart 2).
    • p) probably due to different steric environments in the initiating and propagating species. The trisubstituted vinylrhodium moiety in the initiating species is sterically more demanding than the disubstituted vinylrhodium moiety in the propagating species. Hence, coordination of PA to the propagating species should be more facile than to the initiating species, causing broadening of MWD in the initial stage of polymerization (see Chart 2).
  • 80
    • 33846143350 scopus 로고    scopus 로고
    • Catalyst 2 was also employed for the polymerization of N-propargyl-heptanamide (3a, tert-butylacetylene (3b, and n-hexyl propiolate (3c, In the presence of 5 equiv of Ph3P to Rh, catalyst 2 polymerized 3a with somewhat broad MWD (Mw/Mn, 1.40, and further increase of Ph3P did not narrow the MWD. Despite the broad MWD, the M n of the formed polymer increased in direct proportion to polymer yield, while the Mw/Mn practically remained unchanged in the multistage polymerization of 3a thus indicating a living-like nature of this polymerization. The larger Mw/M n values are probably an outcome of an unfavorably large ratio of propagation and initiation rates (kp/ki) in accordance with our previous results.18b The catalyst system 2/Ph3
    • n and polymer yield was far from linear ruling out the possibility of living polymerization. Monomer 3c afforded polymer only in low yield (≤20%) with bimodal GPC curve, suggesting a nonliving polymerization.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.