The production of gaseous hydrocarbons, nitriles, amines, and hydrazines in a continuous-flow microwave plasma discharge excited in a 20% C 2 H 2 +80% N 2 mixture at a pressure of 20 Torr is reported. The product analysis was made by Li + ion attachment mass spectrometry. A variety of N-containing organics (identified as HC n N (n=1-7), NC(C≡C) n CN (n=0-2), NC(CH 2 ) n CN (n=0-6), C n H 2 n - 1 NH 2 (n=0-6), C n H 2 n + 1 N(H)NH 2 (n=0-5), etc.) were formed and these were tentatively assigned to nitriles, amines, and hydrazines. The mass-spectral analysis exhibited progressions differing by 14 mass units. Reaction schemes were proposed to explain the formation of some molecules.