Gas-phase oxidative chemistry of volatile organic compounds (VOCs) via HOx (OH+HO2), ozone, and NO3 is central to tropospheric ozone and secondary organic aerosol (SOA) production. SOA and ozone both affect human health and influence climate. Recent work is providing new insights into important details of this chemistry, such as discrepancies in the HOx budget and the production of higher-generation VOC oxidation products. Understanding the HOx budget and the details of the formation of higher-generation oxygenated VOCs is important, as usually multiple oxidation steps are necessary to reduce the volatility of VOCs enough to form SOA, and as all oxidation steps contribute to ozone production. There has been substantial progress in a more complete mechanistic understanding of VOC oxidation, in particular for isoprene, both from theoretical and modeling studies, as well as from field and laboratory experiments. The meeting will aim at presenting a comprehensive review of the state-of-the-art of gas phase atmospheric chemistry. It will also address outstanding questions and will include discussions of areas for future research.