C-N bond formation in the gas phase reaction of C(+) with NH3

Details C-N bond formation in the gas phase reaction of C(+) with NH3 C-N bond formation in the gas phase reaction of C(+) with NH3

Jan 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jchph..84..127c&link_type=abstract

Journal of Chemical Physics (ISSN 0021-9606), vol. 84, Jan. 1, 1986, p. 127-134. DOE-supported research.

Physics

Chemical Physics

5

Ammonia, Carbon, Chemical Bonds, Gas-Ion Interactions, Interstellar Chemistry, Energy Distribution, Ground State, Hydrogen Bonds, Positive Ions

Scientific paper

A study of the reaction of C(+) with NH3 at collision energies near 2 eV is presented. The reaction proceeds through a long lived intermediate which is hypothesized on the basis of ab initio calculations to be the nonclassical cation HCNH2(+) produced by insertion of C(+) into the N-H bond. Mass 28 production appears to proceed through a substantial exit channel barrier, suggesting that N-H bond cleavage in the intermediate complex yields HCNH(+), hypothesized to be important in interstellar synthesis of large molecules. The recoil distribution is significantly broader than the predictions of phase space theory. Mass 27 production yields a recoil distribution which is also broader than predicted by a statistical theory and which appears to be a superposition of two channels releasing different amounts of kinetic energy. It is hypothesized that the intermediate complex decays by (1,1) geminal elimination of H2 to yield HCN(+), while HNC(+) is also produced by (1,2) vicinal elimination from the same intermediate.

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