Abstract
The evolution of the universe was dealt with on the view point of the chemical reactions taking place in the dark clouds in the interstellar medium. The reactions of H atoms with N, C, O, CO, CH3CN, and C2 hydrocarbons in solid phase at 10 K were investigated by temperature-programmed mass spectrometry and FT-IR spectroscopy. The reactions investigated led to the formation of organic compounds which are important for the evolution of life. It was found that the solid-phase tunneling reactions taking place on the dust grains at ~10 K play important roles for the chemical evolution in the dark clouds.
