Smog chamber/Fourier transform infrared (FTIR) techniques were used to measure the kinetics of the reaction of n-CH2 = CH(CH2)(x)CN (x = 0-4) with Cl atoms, OH radicals, and O-3: k(CH2 = CHCN + Cl) = (1.03 +/- 0.13) X 10(-10), k(CH2 = CHCH2CN + Cl) = (2.02 +/- 0.35) X 10(-10), k(CH2 = CH(CH2)(2)CN + Cl) = (2.75 +/- 0.45) x 10(-10), k(CH2 = CHCN + OH) = (4.21 +/- 0.95) X 10(-12), k(CH2 = CHCH2CN + OH) = (1.55 +/- 0.34) X 10(-11), k(CH2 = CH(CH2)(2)CN + OH) = (2.98 +/- 0.64) X 10(-11), k(CH2 = CH(CH2)(3)CN + OH) = (3.34 +/- 0.64) X 10(-11), k(CH2 = CH(CH2)(4)CN + OH) = (3.61 +/- 0.85) X 10(-11), k(CH2 = CHCN + O-3) = (2.55 +/- 0.28) X 10(-20), k(CH2 = CHCH2CN + O-3) = (1.17 +/- 0.24) X 10(-18), k(CH2= CH(CH2)(2)CN + O-3) = (3.35 +/- 0.69) X 10(-18), k(CH2 = CH(CH2)(3) CN + O-3) = (4.07 +/- 0.82) X 10(-18), and k(CH2 = CH(CH2)(4)CN + O-3) = (7.13 +/- 1.49) X 10(-18) cm(3) molecule(-1) s(-1) at a total pressure of 700 Torr of air or N-2 diluents at 296 +/- 2 K. CH2ClC(O)CN, HC(O)CN, HC(O)Cl, HCN, NCC(O)OONO2, and ClC(O)OONO2 were identified as products from the Cl initiated oxidation of CH2 = CHCN. The product spectra were compared to experimental and theoretically calculated IR spectra. No products could be determined from the oxidation of n-CH2 = CH(CH2)(x)CN (x = 1-4). With the determined OH rate constants, the atmospheric lifetimes for n-CH2 = CH(CH2)(x)CN (x = 0-4) were estimated to be 66, 18, 9.3, 8.3, and 7.7 h, respectively. It was found that these unsaturated nitriles have no significant atmospheric environmental impact.