Hydrogen cyanide (HCN) is one of the most abundant organic molecules found in interstellar clouds, comets, and planetary atmospheres. It forms through radical reactions between CHx and N produced from methane and nitrogen molecules by the action of UV radiation, cosmic rays, or lightning. This small molecule plays a key role in understanding the evolution of the universe and the origin of life. We can also find it in laboratory plasma fed with vapors of organic molecules with an NH2 group or ignited in a gas mixture of hydrocarbon gas and NH3 or N2. This work aims to investigate low-pressure plasma with cyclopropylamine (CPA) vapors using optical emission spectroscopy of radiofrequency pulsed and continuous discharges under various conditions (power, frequency, pressure, and percentage of CPA in argon). The goal is to obtain information about the production of CN and other atomic and molecular particles in plasma and to correlate them with the chemical structure of layers deposited from radicals created by plasma.