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Volumn 44, Issue 45, 2005, Pages 7473-7477

Cationic yttrium methyl complexes as functional models for polymerization catalysts of 1,3-dienes

Author keywords

Cations; Coordination modes; Polymerization; Rare earth metals; Yttrium

Indexed keywords

CATALYSIS; CATIONIC POLYMERIZATION; CHARACTERIZATION; POSITIVE IONS; YTTRIUM;

EID: 28044443397     PISSN: 14337851     EISSN: None     Source Type: Journal    
DOI: 10.1002/anie.200502915     Document Type: Article
Times cited : (142)

References (63)
  • 3
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    • (2004) Angew. Chem. Int. Ed. , vol.43 , pp. 2234-2239
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    • (Eds.: G. C. Eastmond, A. Ledwith, S. Russo, B. Sigwalt), Pergamon, Oxford
    • a) A. Porri, A. Giarusso in Comprehensive Polymer Science, Vol. 4, Part II (Eds.: G. C. Eastmond, A. Ledwith, S. Russo, B. Sigwalt), Pergamon, Oxford, 1989, pp. 53-108;
    • (1989) Comprehensive Polymer Science , vol.4 , Issue.2 PART , pp. 53-108
    • Porri, A.1    Giarusso, A.2
  • 13
    • 0000105436 scopus 로고    scopus 로고
    • (Eds.: B. Cornils, W. A. Herrmann), VCH, Weinheim
    • b) R. Taube, G. Sylvester in Applied Homogeneous Catalysis, Vol. 1 (Eds.: B. Cornils, W. A. Herrmann), VCH, Weinheim, 1996, pp. 280-318.
    • (1996) Applied Homogeneous Catalysis , vol.1 , pp. 280-318
    • Taube, R.1    Sylvester, G.2
  • 17
    • 28044471729 scopus 로고    scopus 로고
    • see refs. [1b], [1e], and [3a], and references therein
    • d) see refs. [1b], [1e], and [3a], and references therein.
  • 19
    • 28044471331 scopus 로고    scopus 로고
    • see ref. [6b]
    • 3), see ref. [6b];
  • 21
    • 0242323505 scopus 로고    scopus 로고
    • Angew. Chem. Int. Ed. 2003, 42, 5075-5079;
    • (2003) Angew. Chem. Int. Ed. , vol.42 , pp. 5075-5079
  • 22
    • 28044455591 scopus 로고    scopus 로고
    • see ref. [6d]
    • 4], see ref. [6d];
  • 24
    • 17044371606 scopus 로고    scopus 로고
    • Angew. Chem. Int. Ed. 2005, 44, 1668-1671;
    • (2005) Angew. Chem. Int. Ed. , vol.44 , pp. 1668-1671
  • 32
    • 28044431545 scopus 로고    scopus 로고
    • a) CCDC-268899, -268900, -268901, and -268902 contain the supplementary crystallographic data for this paper. These data can be obtained free of charge from The Cambridge Crystallographic Data Centre via www.ccdc.cam.ac.uk/ data_request/cif;
  • 33
    • 28044457834 scopus 로고    scopus 로고
    • note
    • 4] in THF (see Supporting Information).
  • 34
    • 28044471132 scopus 로고    scopus 로고
    • see ref. [9b]
    • 2, which contains a ring-opened THF group according to an X-ray crystallographic determination. For similar reactions, see ref. [9b];
  • 36
    • 28044432923 scopus 로고    scopus 로고
    • note
    • 5] pyridine (see Supporting Information).
  • 40
    • 28044442211 scopus 로고    scopus 로고
    • note
    • 3 did not lead to 1,3-diene polymerization.
  • 41
    • 28044432922 scopus 로고    scopus 로고
    • note
    • 3 (probably needed as scavenger for THF). See Supporting Information for experimental details.
  • 42
    • 28044431765 scopus 로고    scopus 로고
    • see refs. [3b] and [13b]
    • a) Up to three growing chains per metal center have been reported for neutral allyl rare-earth complexes, see refs. [3b] and [13b];
  • 44
    • 28044443296 scopus 로고    scopus 로고
    • note
    • 4] does not catalyze the polymerization of isoprene. The yellow color of the reaction mixture indicates the formation of an allylic species as a result of CH activation of toluene;
  • 45
    • 28044457833 scopus 로고    scopus 로고
    • see ref. [14c] and references therein
    • 4, benzene, toluene, see ref. [14c] and references therein;
  • 47
    • 28044438645 scopus 로고    scopus 로고
    • see refs. [15b-e], and references therein
    • 6-coordination of phenyl groups of the borate counterion to cationic lanthanide complexes, see refs. [15b-e], and references therein;
  • 52
    • 28044460755 scopus 로고    scopus 로고
    • see refs. [16b, c]
    • a) Polymerization-active contact ion pairs are unknown in lanthanide chemistry, the presence of non- or weakly coordinating anions is generally regarded as a decisive factor in the polymerization activity, see refs. [16b, c];
  • 54
  • 55
    • 28044472688 scopus 로고    scopus 로고
    • see, for example, refs. [2b] and [17b-c], and references therein
    • a) For Ln-F interactions in cationic lanthanide compounds with perfluorinated borate counterions, see, for example, refs. [2b] and [17b-c], and references therein;
  • 58
    • 28044462587 scopus 로고    scopus 로고
    • see ref. [18e]
    • 6-coordination of the solvent to cationic scandium complexes, see ref. [18e];
  • 60
    • 28044444488 scopus 로고    scopus 로고
    • see ref. [18b]
    • a) In cationic alkylchromium complexes, similar reactivity differences between complexes with protonated and perfluorinated counterions are seen, see ref. [18b];
  • 62
    • 28044436220 scopus 로고    scopus 로고
    • note
    • 8]toluene by NMR spectroscopy were unsuccessful, because of the formation of easily decomposable, oily, two-phase systems as a result of the relatively high concentrations required;
  • 63
    • 28044438857 scopus 로고    scopus 로고
    • see ref. [2b]
    • 4], for which the resulting cationic complex was examined by X-ray crystallography, see ref. [2b].


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.