NONTRADITIONAL MECHANISMS OF SOLID-PHASE ASTROCHEMICAL REACTIONS

The mechanisms of solid-phase reactions that can be directly related t o the formation of organic substances in space and their delivery to t he Earth as well as the problems of prebiotic evolution are considered . These mechanisms are molecular tunneling (the hypothesis of the cold prehistory of life), polycondensation of solid monomers in shock wave s (the problem of delivery of organic substances to the Earth with met eorites), thermal and thermal-wave explosions and oscillations of the radical concentration and temperature of cold small particles in the i rradiation fields, and mechanochemical explosions and autowave propaga tion of chemical reactions us a result of the positive feedback betwee n destruction of solids and reactions on newly formed surfaces.