On the photodissociation of propadienylidene, l-C3H2

Physical Chemistry Chemical Physics : PCCP
Christoph GrossIngo Fischer

Abstract

We investigate the photochemistry and photodissociation dynamics of the linear C3H2 isomer propadienylidene by two-colour photofragment Doppler spectroscopy at excitation wavelengths between 260 and 230 nm, corresponding to excitation into the C1 A1 state. Propadienylidene is generated by pyrolysis from IC3H2Br. Almost complete conversion of the precursor can only be achieved at high pyrolysis temperatures. Two reaction channels, H-atom loss and loss of H2 molecules, are energetically close. Our results show that H-atom loss is indeed important in the investigated energy range. The Doppler profiles indicate that 34-37% of the excess energy is released as translation. The rates for H-atom loss are faster than the time resolution of our nanosecond-laser setup, kH > 10(8) s(-1).

References

Apr 21, 2007·The Journal of Chemical Physics·Bastian Noller, Ingo Fischer
Jan 22, 2008·The Journal of Chemical Physics·Sean M SheehanDaniel M Neumark
Mar 26, 2008·The Journal of Chemical Physics·Scott J GoncherDaniel M Neumark
Mar 7, 2005·Physical Chemistry Chemical Physics : PCCP·T SchüsslerI Fischer
Dec 7, 2005·Physical Chemistry Chemical Physics : PCCP·Wolfgang Eisfeld

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Citations

Jun 25, 2009·Physical Chemistry Chemical Physics : PCCP·Bastian NollerIngo Fischer
Sep 21, 2011·Physical Chemistry Chemical Physics : PCCP·Michael SteinbauerChristian Alcaraz
Feb 25, 2014·Physical Chemistry Chemical Physics : PCCP·Jens GiegerichIngo Fischer
Jan 24, 2019·Physical Chemistry Chemical Physics : PCCP·Michael N R AshfoldJingsong Zhang
Jul 6, 2010·Journal of Computational Chemistry·Qiang HaoHenry F Schaefer
Feb 28, 2009·The Journal of Physical Chemistry. a·Bastian NollerJ M Mestdagh
Jun 16, 2010·The Journal of Physical Chemistry. a·Patrick HembergerHéloïse Soldi-Lose

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