New H and H2Reactions with Small Hydrocarbon Ions and Their Roles in Benzene Synthesis in Dense Interstellar Clouds
Citations Over TimeTop 12% of 1999 papers
Abstract
This paper summarizes the most recent knowledge concerning normal and three-body association ion-molecule reactions between small hydrocarbon ions (CmH+n; m=1-6, n=0-9) and the neutral reactants H and H2. Selected radiative association reaction rate coefficients have been calculated and estimated based on three-body laboratory results. Some of the normal and radiative association rate coefficients have been incorporated into our "new standard" model of dense cloud interstellar chemistry. We find that atomic H provides an insufficiently appreciated mechanism to increase the level of saturation of CmH+n ions, with m>3 in dense interstellar clouds despite the fact that the H/H2 abundance ratio is only 10-4. New model results show in particular that a significant abundance of the basic aromatic cyclic molecule benzene (c-C6H6) can now be produced in dense clouds.
Related Papers
- → UV-driven chemistry in simulations of the interstellar medium(2012)56 cited
- → Cosmic-ray astrochemistry(2013)46 cited
- → The Structure of the Neutral Interstellar Medium: A Theory of Interstellar Turbulence(1996)
- Boundary conditions for the paleoenvironment: Chemical and Physical Processes in dense interstellar clouds(1986)
- → The Structure of the Neutral Interstellar Medium: A Theory of Interstellar Turbulence(1996)