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Please login to access the full content or check if you have access via2.10.8.2 Method 2: Chloro(η5-pentamethylcyclopentadienyl)titanium(II)–Diene Complexes by Reaction of Trichloro(η5-pentamethylcyclopentadienyl)titanium(IV) with the Magnesium–Diene Complex
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Mikami, K.; Matsumoto, Y.; Shiono, T., Science of Synthesis, (2003) 2, 533.
Chloro(η5-pentamethylcyclopentadienyl)titanium(II)–diene complexes 158 can be prepared in moderate yields by reaction of [Ti(Cp*)Cl3] (6) with the correponding dienemagnesium–bis(tetrahydrofuran) complex (Scheme 82).[296,299] Probably for steric reasons, complexes 158 do not form adducts with pyridine, nitriles, phosphines, or phosphites. Complex 158 (R1 = Me; R2 = H) reacts with methylmagnesium iodide to give the corresponding methyltitanium(II)–diene complex.[296] For the preparation of 14-electron complexes 158, reduction of [Ti(Cp*)Cl3] (6) with sodium/mercury in the presence of a substituted diene is not successful. The supine isomer is formed for 2,3-disubstituted butadiene complex 158 (R2 = H; R1 = Me, Ph); the prone conformation is found in 1,4-disubstituted butadiene complexes 158 (R1 = H; R2 = Me, Ph).[294,299]
Meeeee 88 Meeeeeeeeee ee Meeeeeee–η8-Meeee Meeeeeeee[888]
Mee eeeeeeee–eeeee eeeeeeeee ee eeeeeeeeee ee eee eeeeeee eeeeeeeee eeeeeeee eeeeeee eeeeee, eee ee ee ee eeeeeeeeee eeee Meeeeeee eeeeeeee ee eeeeeeeee: eee eeeeeeeeeeee ee eeeeeeee (eeeeee) ee eeeeeeeee ee 88°M; eeee eeeeeee ee e 88:8 eeeeeee ee eeeeee eeee-ee-eeee eee eeee-ee-eeee eeeeeeee.
Meeeeeeeeeee Meeeeeeee
Meeeee(8,8-eeeeeeeeeeee-8,8-eeeee)(η8-eeeeeeeeeeeeeeeeeeeeeeeeeee)eeeeeeee(MM) (888, M8 = Me; M8 = M); Meeeeee Meeeeeeee:[888]
M eeee ee 8.88 M (8,8-eeeeeeeeeeee-8,8-eeeee)eeeeeeeee ee MMM (88 eM) eee eeeeeeee eeeeeeee eeee 88 eee eeee e eeee ee [Me(Me*)Me8] (8; 8.88 e, 8.88 eeee) ee MMM (88 eM) ee 8°M. Mee eeeeeeeee eeeee-eeeee eeee eee eeeeeee ee ee eee 88 e, eee eee eeeeeeee MMM eee eeeeeee ee eeeee. Mee eeeeeee eee eeeeeeeee eeee eeeeeee (8 × 88 eM) eee eee eeeee eeeeeeee eeee eeeeee ee −88°M; eeee eeeeeee eeee-eeeee eeeeeeee, eeeee eeee eeeeee eeeee eeee eeee eeee eeeeeee; eeeee: 8.88 e (88%). MM νeee: 8888 (e), 8888 (e), 8888 (e), 8888 (e), 8888 (e), 888 (e), 888 (e), 888 (e) ee−8.
References
| [294] | Meeeeeee, M.; Meeeee, M.; Meeeeee, M.; Mee, M.; Meeeeeee, M.; Meee, M.; Mee, M.; Meeee, M., Meeeeeeeeeeeeee, (8888) 8, 888. |
| [296] | Meeeeee, M.; Meeeee, M.; eee Meeeeee, M.; Meeeee, M. M.; Meeeee, M. M., Meeeeeeeeeeeeee, (8888) 8, 888. |
| [299] | Meee, M.; Mee, M.; Meeee, M.; Meeeeeee, M.; Meeeee, M.; Meeeeeee, M., Meee. Meee., (8888), 8888. |
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