A vanadium(V) alkylidene complex exhibiting remarkable catalytic activity for ring-opening metathesis polymerization (ROMP)

Organometallics

Volumn 24, Issue 10, 2005, Pages 2248-2250

  Yamada, Junji ^a   Fujiki, Michiya ^a   Nomura, Kotohiro ^a  

^a NARA INSTITUTE OF SCIENCE AND TECHNOLOGY   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

CATALYST ACTIVITY; HIGH TEMPERATURE EFFECTS; HYDROGEN BONDS; MOLECULAR WEIGHT; NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY; ORGANOMETALLICS; POLYMERS; RING OPENING POLYMERIZATION; RUTHENIUM COMPOUNDS; SYNTHESIS (CHEMICAL);

INSERTIONA POLYMERIZATION; LIGAND; RING-OPENING METATHESIS POLYMERIZATION (ROMP); STRUCTURAL DETERMINATION;

VANADIUM COMPOUNDS;

EID: 18844462731     PISSN: 02767333     EISSN: None     Source Type: Journal    
DOI: 10.1021/om0501834     Document Type: Article

References (31)

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17. 3) and NBE or acetone was observed
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19. 4b were reported previously. However, the latter case showed extremely low catalytic activity (TON 0.92 after 96 h at 20 °C) and no NMR or GPC results for the resultant polymers were given in the text.
20. Examples: (a) Carrick, W. L. J. Am. Chem. Soc. 1958, 80, 6455-6456.
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24. Part of these results were introduced at the XXIst International Conference on Organometallic Chemistry, P151, July 2004, Vancouver, Canada.
25. Nomura, K.; Sagara, A.; Imanishi, Y. Macromolecules 2002, 35, 1583-1590. Examples of ROMP by vanadium catalysts were cited therein.
26. Detailed results (including the crystal structures) are given in the Supporting Information.
27. 2V: C, 53.55; H, 7.14; N, 7.35. Found: C, 53.71; H, 7.14; N, 7.26.
28. 1/2 = 900 Hz).
29. For more details, see the Supporting Information.
30. 2PSiV: C, 60.99 (58.68 + VC); H, 9.81; N, 5.93. Found: C, 58.68; H, 9.72; N, 5.73.
31. 3/V molar ratio in the ROMP by 5. A study concerning the actual catalytically active species for the ROMP is now being carried out.