All Tables

Table 1: The wavenumbers ( $\tilde\nu$ in cm^-1) of the most prominent peaks of the heterocycles with their assignments, used to monitor the UV photodestruction. $\nu$ denotes a stretching mode, $\beta$ is a bending mode and $\tau$ refers to a torsion mode. Taken from a Destexhe et al. (1994) and b Morrison et al. (1997).
Table 2: The UV destruction cross-sections ( $\sigma _{\rm uv}$ ) and half-lives in the experimental set-up in the laboratory and in the diffuse interstellar environment (DISM), dense clouds (DC) and the Solar System at 1 AU from the Sun (SoSy). Also included in this table is the cyclic hydrogen-bonded trimer of HCN, which is the first photoproduct of s-triazine. Upon continued irradiation, c-(HCN)₃ is also photolysed, see Fig. 4.
Table 3: Wavenumbers (in cm^-1) of the photoproducts that appeared after UV irradiation of pyridine, pyrimidine or s-triazine. The band assignments were taken from a Milligan & Jacox (1973); b Ruiterkamp et al. (2005); c Satoshi et al. (1997); and d Stroh & Winnewisser (1989). The bands for HCN and C₂H₂ in the pyrimidine photoproducts are shifted with respect to the bands given in the references, so a complex between HCN and C₂H₂ is inferred (see text).