Flash vacuum pyrolysis (FVP) on zeolites: Pyrolysis of 5-β (hydroxyethyl)-5H-dibenzo[a,d]cycloheptene

Autor: Mircea D. Banciu, Constantin Draghici, Ovidiu Cira, Anca Banciu, Aurica Petride
Rok vydání: 1997
Předmět:
Zdroj: Journal of Analytical and Applied Pyrolysis. 42:177-188
ISSN: 0165-2370
DOI: 10.1016/s0165-2370(97)00037-5
Popis: FVP of the title alcohol (9) at 0.65 mbar in argon atmosphere at 350 °C in the presence of seven different acidic zeolites afforded 7H-benzo[c]fluorene (13) and 6,11b-dihydro-7H-ben-zo [c]fluorene (12) as main reaction products. The suggested carbocationic reaction mechanism is supported by: 1. (a) the occurrence of two isomeric dibenzo(C9H10)hydrocarbons, namely 1,1a,6,10b-tetrahydro-1,6-methanodibenzo[a,e]cyclopropa[c]cycloheptene (6) and 9,10-dihydro-9,10-propenoanthracene (5), in the pyrolyses of 9 and 2. (b) by the results of FVP of authentic samples of 6 (conducting mainly to hydrocarbons 12 and 13), respectively 5 (affording to greatest extent the minor products observed in pyrolyses of 9).
Databáze: OpenAIRE