Origin of Pyrene under High Temperature Conditions in the Gas Phase. The Pivotal Role of Phenanthrene

…, LW Jenneskens, RGB Steggink…

Index: Sarobe, Martin; Jenneskens, Leonardus W.; Steggink, Ralph G. B.; Visser, Tom Journal of Organic Chemistry, 1999 , vol. 64, # 11 p. 3861 - 3866

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Citation Number: 7

Abstract

4-Ethynylphenanthrene (15), and the latent precursors for 2-ethynyl-(18) and 3- ethynylphenanthrene (19), viz., 2-(1-chloroethenyl)-(16) and 3-(1-chloroethenyl) phenanthrene (17), respectively, have been subjected to flash vacuum thermolysis (FVT). Whereas at 800° C 15 is quantitatively converted into pyrene (1), 16 and 17 only give 18 and 19, respectively. Both 18 and 19 contain redundant ethynyl substituents, ie, after ethynyl- ...