Why HOC + is Detectable in Interstellar Clouds: The Rate of the Reaction between HOC + and H 2

Details Why HOC + is Detectable in Interstellar Clouds: The Rate of the Reaction between HOC + and H 2 Why HOC + is Detectable in Interstellar Clouds: The Rate of the Reaction between HOC + and H 2

Jun 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996apj...463l.113h&link_type=abstract

Astrophysical Journal Letters v.463, p.L113

Astronomy and Astrophysics

Astronomy

18

Ism: Abundances, Ism: Clouds, Ism: Molecules, Molecular Processes

Scientific paper

The recent confirmation by Ziurys and Apponi of the detection of HOC+ toward Sgr B2 (OH), and their identification of the ion in Orion-KL and several other sources show that HOC+ is far more abundant than predicted by previous ion-molecule models. In these models, the reaction HOC+ + H2 --> HCO+ + H2 is assumed to rapidly destroy HOC+, based on the results of a prior calculation. We have recalculated the rate of this reaction as a function of temperature using a new ab initio potential surface and a phase space approach to the dynamics which includes tunneling. The newly calculated rate is small (<=1 x 10-10 cm3 s-1) at temperatures under 100 K.

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