Abstract
Pentacene was first obtained by dehydrogenation of dihydropentacene (V). This is formed by pyrolysis of the ketones (I), (II) and (III). Pentaphene (see p. 353) is also produced as a by-product, sometimes even by re-arrangement of the ketones. Dibenzoyl-m-xylene (I) is prepared from xylene, benzoyl chloride and aluminium chloride under rather drastic conditions. The ketone (II) is formed from terephthaloyl chloride and o-tolyl magnesium bromide and the ketone (III) is obtained from 4benzyl-1,3-dimethylbenzene, benzoyl chloride and aluminium chloride.1
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References
Clar, E., Kelly, W. and Niven, W. G., J. chem. Soc. 1833 (1956).
Arbusow, B. A., Abramow, W. S. and Dewtjatow, J. B., J. gen. Chem. U.S.S.R. 9, 1559 (1939).
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© 1964 Springer-Verlag Berlin Heidelberg
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Clar, E. (1964). Hydrocarbons with Five Linearly Annellated Rings. In: Polycyclic Hydrocarbons. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-01665-7_24
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DOI: https://doi.org/10.1007/978-3-662-01665-7_24
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