Abstract
The current status of models of diffuse interstellar clouds is reviewed. A detailed comparison of recent gas-phase steady-state models shows that both the physical conditions and the molecular abundances in diffuse clouds are still not fully understood. Alternative mechanisms are discussed and observational tests which may discriminate between the various models are suggested. Recent developments regarding the velocity structure of diffuse clouds are mentioned. Similarities and differences between the chemistries in diffuse clouds and those in translucent and high latitude clouds are pointed out.
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van Dishoeck, E.F., Black, J.H. (1988). Diffuse Cloud Chemistry. In: Millar, T.J., Williams, D.A. (eds) Rate Coefficients in Astrochemistry. Astrophysics and Space Science Library, vol 146. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-3007-0_14
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