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Published May 1987 | public
Journal Article

Pyrolysis of acetylene: a thermal source of vinylidene


We now report the results of kinetic and trapping experiments performed in acetylene/benzene and acetylene/toluene mixtures above 820 K by modulated beam dynamic mass spectrometry which provide direct evidence of vinylidene participation in chemical reactions. Under such conditions the fast equilibrium HC=CH ⇌ H_2C=C2^(2•) (1, -1) precedes carbene addition to the aromatic ring thereby circumventing kinetic restrictions arising from the short lifetime of vinylidene.

Additional Information

© 1987 American Chemical Society. Received November 21, 1986. We are grateful to CIC and CONICET of Argentina for financial support.

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October 23, 2023