Abstract: The photochemical reactions of sulfur dioxide and 1-hexene in the presence or absence of oxygen systems were studied by GC and GC-MS methods. We found the formation of aerosol and a series of products such as aldehydes, ketones, acids, esters and organic sulfur compounds which condensed on the inner-surface of silica bottle. According to the characteres of such compounds and chemical kinetic theories, we suggested the mechamisms of these photo-chemical reactions. These results are very important to the chemistry of air pollution.

Key words: Sulfur dioxide, 1-Hexene, Photo-chemical reaction