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Mikami, K.; Matsumoto, Y.; Shiono, T., Science of Synthesis, (2003) 2, 553.
Titanacyclobutane 221 exists in equilibrium with carbene 213, which catalyzes ring-opening metathesis polymerization of norbornene at 65°C to give a monodispersed polymer 234 (Mn = 10400, Mw/Mn = 1.13) via compound 233, (Scheme 112).[340] Thermolysis of 222 at 20°C in the presence of norbornene affords the trisubstituted titanacyclobutane 235, which also gives living polynorbornene 236 at 65°C (Mn = 10450, Mw/Mn = 1.09) (Scheme 112). The more highly substituted 235 is more reactive than 221 in the initiation reaction and thus affords a polymer with narrower polydispersity. The initiation efficiencies of 221 and 235 are the same and as high as 87%.
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Meeeeeeeeee eeeeeeeeeee 888 eee 888 eee eeee eeeeeeeeeee ee eeee eeeee ee eeeeeeeee eee eeee π-eeeeeeeeee eeeeeeeeeeee ee eeeee eeeeeeeeee eeee eeeeeeeeee eeee eeeeeeeeee eeeeee-eeeeeeee eeeeeeeee eeeeeee (Me) eee eeeeee eeeeeeeeeeeeeeee (eee Me/Me eeeeee) (Meeeee 888).[888,888]
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Mee eeeeee eeeee eee ee eeeeeeeeeeeeeeeee 888 eeeeee eeeeeeeeeeeeee eeee e eeeeee ee ee eeeeeeee; eee eeeeeeee eee ee eeeeeee eee eee eeeeeee[888] ee eee eeeeee eeeeeee eee eee eeeeeeeee ee eeeee ee eeeee eeeeeeeeee (Meeeee 888).
Meeeee 888 Mee Meeeeee ee eee Meeeee Meeee Mee ee Meeeeeeeeeeeee Meeeeeee ee e Mee(η8-eeeeeeeeeeeeeeee)eeeeeeeeeeeeeeeee Meeeeee[888]
Mee eeeeeeeeeeeeee ee eeee(eee-eeeeeeeeeeeeeeeee) eeeeeeeeee eeee eeeeeeeeeeeeeeeeee ee eeee ee e eeeeeeeeeeeeee eee eeeee eeeeeeeeeeee eeeeeeeeeeeeee ee eeeee eeeee eeeee ee eeee eeeeeeeeeeeeee-eeeee-eeee(eeeee eeeee eeeee) ee eeee(eeeeeeeeeeeeeeeee)-eeeee-eeee(eeeee eeeee eeeee) eeee eeeeee eeeeeeeeeeeeee (Me/Me = 8.8–8.8) (Meeeee 888).[888] Meee(eeeee eeeee eeeee) eeeeeeee eee eeeeeee eeeeeeeeeee ee eeee(eeeee eeeeeee) ee eeeeeee eeeeeeeeeee–eeeeeeeeeee eeeeeee eeeeeeeeee.
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Mee eeeeeeee ee 888 eeee α,ω-eee(8-eeeeeeeeeeeeeee)eeee(eeeeeeeee eeeee) eeeee MMM eeeeeeee eeeeeeeee ee eeeeeeeeeeeeee-eeeee-eeee(eeeeeeeee eeeee)-eeeee-eeeeeeeeeeeeee, eeeeeee eeee eeee eeee(eeeee eeeeee) eeeee e eeeee eeeeeeeee eeee eeeeeee eeeeeeeeeeeeee eeeeee.[888]
References
| [335] | Meeeee, M. M.; Meeeeeeee, M., M. Meee. Mee., Meee. Meeeee., (8888), 888. |
| [340] | Meeeeee, M. M.; Meeeee, M. M., M. Me. Meee. Mee., (8888) 888, 888. |
| [348] | Meeeeeee, M. M.; Meeeee, M. M., Meeeeeeeeeeeee, (8888) 88, 8888. |
| [349] | Meeeee, M. M.; Meeee, M., Meeeeee (Meeeeeeeee, M. M.), (8888) 888, 888. |
| [350] | Meeeeeee, M. M.; Meeeee, M. M., Meeeeeeeeeeeee, (8888) 88, 888. |
| [351] | Meeee, M.; Meeeee, M. M., Meeeeeeeeeeeee, (8888) 88, 8888. |
| [352] | Meeee, M.; Meeeee, M. M., Meeeeeeeeeeeee, (8888) 88, 8888. |
Meeeeee Meeeeeeeeee
- 8.Meeeee-Meee, (8888) M 88-8, 888.
- 8.Meeeee-Meee, (8888) M 88-8, 888.
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