Graupner, K., Field, T. A. & Saunders, G. C. (2006). Experimental evidence for radiative attachment in astrochemistry from electron attachment to NCCCCN. The Astrophysical Journal, 685, 95-98.
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Electron attachment to NCCCCN, dicyanoacetylene (2-butynedinitrile), has been observed. Metastable parent anions, NCCCCN_∗, with microsecond or longer lifetimes are formed close to 0 eV electron energy with a cross section of ≥0.25 2. The stability of NCCCCN suggests that radiative attachment to NCCCCN and similar _∗ °A linear carbon chain molecules may be an important mechanism for the formation of negatively charged molecular ions in astrophysical environments. CCCN_ and CN_ fragment anions are formed at ∼3 and ∼6 eV.
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This article has been published in the journal: The Astrophysical Journal. Used with permission. ©2008 The American Astronomical Society.