Troposphere nitriles

The available experimental data suggest that this class of reduced nitrogen compounds will react mainly with OH radicals under tropospheric conditions. Hydrogen cyanide (HCN) reacts only slowly with OH radicals, with a room-temperature rate constant at atmospheric pressure of 3 X 10-14 cm3 molecule-1 s-1 (Atkinson, 1989). For the organic nitriles, the available evidence shows that the OH reaction occurs via H-atom abstraction from the alkyl groups, for example,... 

The photolysis rate of atmospheric NO2 has been measured, and its dependences upon parameters such as the solar zenith angle and the amount of cloud cover have been evaluated.The photochemistry of small molecules containing sulphur, and its implications for the atmospheric S cycle have been discussed, as has the role of stratospheric reactive nitrogen as a source for species such as NO and HNO3 in the unpolluted troposphere. Ammonia concentrations have been calculated in the atmospheres of both Earth and Saturn the far-u.v. photolysis of mixtures of NH3 with methane results in the formation of amines and nitriles, and the relevance of these results to the evolution of primitive atmospheres has been discussed. ... 

---

See also in sourсe #XX -- [ ]

---