The enthalpies of formation of n-bromopropane (CH3CH2CH2Br) and its free radicals (CH2CH2CH2Br, CH3CHCH2Br and CH3CH2CHBr) were estimated by molecular orbital integrated methods using several working chemical reactions with four variants of theoretical approaches (levels) and four extended basis sets. The recommended standard enthalpies of formation are: CH3CH2CHBr, -19.5 +/- 0.6 kcal mol(-1), in excellent agreement with the only experimental datum available; CH2CH2CH2Br, 28.7 +/- 0.3; CH3CHCH2Br, 23.1 +/- 1.4; and CH3CH2CHBr, 25.7 +/- 0.6 kcal mol(-1). These enthalpies of formation correspond to bond dissociation enthalpies of DH2980(H-CH2CH2 CH2Br) = 101.6 +/- 1.0; DH2980,(CH3CH-HCH2Br) = 96.0 +/- 2.1; and DH2980(CH3CH2CHBr-H) = 98.6 +/- 1.2 kcal mol(-1). (C) 2003 Published by Elsevier B.V.