The reactions of GeH 3 with O 2 , NO, and NO 2 were studied via time-resolved infrared diode laser absorption spectroscopy over the temperature range 232-468 K for O 2 and NO, and 252-407 for NO 2 . The measured rate constants (in cm 3 molecule - 1 s - 1 ) werek G e H 3 + O 2 = (10 - 1 3 . 1 8 ± 0 . 1 8 ) exp[(874 ± 146)T], k G e H 3 + N O = (10 - 1 3 . 3 ± 0 . 4 9 ) exp[(736 ± 345)T], and k G e H 3 + N O @ ' 2 = (10 - 1 1 . 4 2 ± 0 . 1 6 ) exp[(276 ± 122)T]. These results are consistent with formation of a collision complex with little or no entrance channel barrier.