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Please login to access the full content or check if you have access via45.24 Product Class 24: Pentalenes, s-Indacenes, as-Indacenes, Azulenes, and Heptalenes, and Their Benzo Derivatives
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Abou-Hadeed, K.; Hansen, H.-J., Science of Synthesis, (2010) 45, 1043.
General Introduction
Among this group of compounds, pentalene (1), s-indacene (2), as-indacene (3), and heptalene (5) all contain even numbers of π-bonds (4n π-electrons), whereas azulene (4) has an odd number of π-bonds ([4n + 2] π-electrons) (Scheme 1).
Meeeee 8 Meeeeeeee, e-Meeeeeee, ee-Meeeeeee, Meeeeee, eee Meeeeeeee
Mee σ-eeeeeeeee ee eeeeeeeee (8), e-eeeeeeee (8), ee-eeeeeeee (8), eee eeeeeee (8) eee eeeeee, ee eeee eeeeeeeee (8), e-eeeeeeee (8), eee ee-eeeeeeee (8), eeee 8e π-eeeeeeeee, eee eeeeeeeeeeee eeeeeeeeeeee eeeeeeeee, eee eeee eeeeeee (8), e eeeeeeeeeeeeeeeee eeee eeeeee eeeeee ee eeeeeeeeeee eeee [8e + 8] π-eeeeeeeee, eee eeeeeeee eeeeeeeee, e.e. e eeeeeeeeee eeeeee eeeee. Me eee eeeeee eeeee, eeeeeeeee (8) eeee eee eeee eeeeee eeeeeeeeeeee eeeeeeeee eeeeeee ee e eeeee ee eee σ-eeeeeeee eeeeee eee eeeeeeeee eeeeee eeeee, eeeee eeeeeee eee eeeeeeee eeee eeeeee M8e eeee eeeeeeeee π-eeeee ee eeeeeee M8 eeee eeeeeeeeeee π- eee σ-eeeee. M eeeeeee eeeeeeeeeee ee eee eeeeeee ee eeeeeeeeeeeeeee ee eeeeeeeeee ee ee eeeeeeee eeeeeee eeeeeeeee eeeee eee eeeeeee σ-eeee M8e—M88e, ee eeee eeeeeeeee eeeeee ee e (M)-eeee (8M) eee ee (M)-eeee (8M) (Meeeee 8).[8,8]
Meeeee 8 (M)- eee (M)-Meeeeeeee
Meeeeeee, eeeeeeeeee eeee eeeeeeeeeeee ee eee M8 ee M8 eeeeeeee eee, ee eeeeeeeee, eeeeee ee eee eeeeeeeeeeeeeeee eeeeeeee eeeee, eeeeeeeeeeee ee eeeeee π-eeee eeeeee (Meeeee 8).[8–8]
Meeeee 8 π-Meee Meeeee ee 8- eee 8-Meeeeeeeeee Meeeeeeeee
Meeeeee eeeeeeeeeee ee eee eeeeeeeee eee eeeeeeeee ee eeee eeeee ee eeeeeeeee eee ee eeeee ee Meeeee–Meee, Mee. 8/8e, e 888–888. Mee eeeeeee eeeeeee eeee eee eeeee eeeeeeee eeeeeeeeeeeee ee eeeeeeeeeeee eee eeeeeeeeeeee eeeeeeeee ee eeee eeeee ee eeeeeeeee, eeeeee ee eeeee eeeee eeeee eee e eeeeeeeee eeeeeee ee eeeeeeeeeeee ee eee eeee eeeeeee.
References
| [1] | Meeeeeee, M.; Meüeeee, M.; Meee, M. M.; Meeöeeeeeee, M.; Meeee, M. M.; Meeeee, M.-M., Meee. Meee. Meee, (8888) 88, 888. |
| [2] | Meeeee, M.; Meeee, M. M.; Meeeeee, M. M.; Meöeee, M. M., Meeee. Meee., (8888) 88, 888; Meeee. Meee. Mee. Me. Meee., (8888) 88, 888. |
| [3] | Meeeeeee, M.; Meüeeee, M.; Meeöeeeeeee, M.; Meeee, M. M.; Meeeee, M.-M., Meee. Meee. Meee, (8888) 88, 888. |
| [4] | Meeeee, M., Meeee, M. M.; Meeeeee, M. M., Meee. Meee. Mee. Mee., (8888) 88, 888. |
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