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Volumn 46, Issue 25, 2007, Pages 4790-4793

Stereospecific styrene enchainment at a titanium site within a helical ligand framework: Evidence for the formation of homochiral polystyrene

Author keywords

Asymmetric catalysis; Chirality; Polymerization; Tacticity; Titanium

Indexed keywords

ACTIVATION ANALYSIS; CATALYSTS; CHIRALITY; ENANTIOMERS; LIGANDS; OLIGOMERIZATION; POLYMERIZATION; POLYSTYRENES; TITANIUM;

EID: 34347248045     PISSN: 14337851     EISSN: None     Source Type: Journal    
DOI: 10.1002/anie.200700783     Document Type: Article
Times cited : (72)

References (39)
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    • Angew1
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    • 0042786588 scopus 로고    scopus 로고
    • the two other diastereomers with cis-β and trans configuration were not observed; for a review on the stereochemistry of complexes containing multidentate ligands, see: P. D. Knight, P. Scott, Coord. Chem. Rev. 2003, 242, 125-143.
    • d) the two other diastereomers with cis-β and trans configuration were not observed; for a review on the stereochemistry of complexes containing multidentate ligands, see: P. D. Knight, P. Scott, Coord. Chem. Rev. 2003, 242, 125-143.
  • 34
    • 34347263974 scopus 로고    scopus 로고
    • Doctoral Thesis, University of Freiburg
    • b) H. Ebeling, Doctoral Thesis, University of Freiburg, 2004.
    • (2004)
    • Ebeling, H.1
  • 35
    • 34347238423 scopus 로고    scopus 로고
    • Catalyst or ligand residues do not show any optical rotation owing to their low concentration
    • Catalyst or ligand residues do not show any optical rotation owing to their low concentration.
  • 38
    • 34347203933 scopus 로고    scopus 로고
    • [2] suggests that at a Λ,R,R titanium site, styrene inserts via the si (pro-R) face with secondary regiochemistry, resulting in a chain of R configurations; likewise styrene inserts at a Δ,S,S titanium site via the re (pro-S) face forming in a chain of S configurations.
    • [2] suggests that at a Λ,R,R titanium site, styrene inserts via the si (pro-R) face with secondary regiochemistry, resulting in a chain of R configurations; likewise styrene inserts at a Δ,S,S titanium site via the re (pro-S) face forming in a chain of S configurations.
  • 39
    • 34347259755 scopus 로고    scopus 로고
    • X-ray crystal structural data for complex rac-2a: C 75H108Cl4O4S4Ti 2, Mr, 1439.45, T, 110 K, crystal dimensions 0.3 x 0.3 x 0.2 mm3, monoclinic, P2 1/c (no. 14, a, 9.9475(9, b, 30.095(3, c, 26.477(2) Å, α, γ, 90°, β, 100.385(2)°, Z, 4, U, 7796.6(12) Å3, ρcalcd, 1.226 g cm-3, μ, 0.494 mm-1, 114 914 collected, 21 765 unique (Rint, 0.0619, final R 1, 0.0618, wR2 [I > 2σI, 0.1178, residual electron density extremes were 0.536 and -0.379 e Å-3. CCDC-637376 contains the supplementary crystallographic data for this paper. These data can be obtained free of charge from The Cambridge Crystallographic Data Centre via
    • -3. CCDC-637376 contains 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.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.