This review covers hydrogen‐atom transfer from carbon‐hydrogen bonds in organic compounds to chlorine atom, methyl, ethyl, trichloromethyl, t‐butoxy and alkylperoxy radicals in the liquid phase. Rate constant data are presented in 38 tables. Literature is covered through most of 1972. The review is divided into six sections; an introduction plus five sections each dealing with specific radicals. Hydrogen‐atom transfer to chlorine atom are presented as relative rate constants. For hydrogen‐atom transfer to methyl, ethyl, trichloromethyl, and t‐butoxy radicals, both relative and absolute rate constants are tabulated. For alkylperoxy radicals only absolute rate constants are listed. Each absolute rate constant has a tabulated set of rate parameters whereAhas been assigned andEderived from the Arrhenius equation.