Chemical Processes in Cometary Comae
  Recent developments in the chemical modelling of cometary comae are described. We discuss the cyanide chemistry and present new HCN observations of the recent comet C/2002 C1 (Ikeya-Zhang). The connection between interstellar and cometary organic molecules is discussed from the perspective of recent theories of interstellar gas-grain chemistry. 
S. B. Charnley (1), S. D. Rodgers (1), H. M. Butner (2), P.   Ehrenfreund (3) ((1) NASA Ames Research Center, (2) SMTO-Stewa...