The gas-phase reaction between the cyano radical and the ethane molecule presents some interesting points for theoretical study: i) It is an exothermic reaction, with a low barrier height (even barrierless), which appears "early" on the reaction path, i.e., close to the reactants; ii) It presents a heavy-light-heavy mass combination (HLH) with a linear transition state, and a small skew angle, = 15.2º,  being the angle between the entrance and exit channels in mass-weighted coordinates. As a consequence of this kinematic condition the dynamics is governed by corner cutting on the skewed potential energy surface and two important effects appear: firstly, a priori, at low temperatures tunnelling should play a significant role, although in this particular reaction with a very low barrier, this effect is negligible, and secondly, substantial vibrational excitation would be expected, especially in the triatomic product; iii) The HCN(v) vibrational distribution presents controversies among different experimental groups. Bethardy et al. found that the HCN(v1,0,v3) states (i.e., bendless excitation) are not initially populated, while Copeland et al. and Morris et al. previously reported noticeable excitation of the bending mode. In this case, the three vibrational modes of HCN are described as C-N stretch (v1), bend (v2), and C-H stretch (v3), and are all IR active; 7 iv) A full-dimensional potential energy surface is not available for this reaction; and finally, v) Its interest in the chemistry of low and ultra-low temperature environments, in the chemistry of planetary atmospheres and of interstellar clouds, and also at high temperatures, in hydrocarbon fuel combustion processes (through the nitric oxide chemistry cycle). The attack of the cyano radical on the ethane molecule begins with the formation of a weak intermediate complex in the entrance channel, RC, which evolves to the saddle point, SP, representing a configuration with formation and breaking of bonds. In the exit channel, an intermediate complex is formed, PC, which evolves to the corresponding products, hydrogen cyanide and ethyl radical, with the following mechanism, CN(X 2  + )+ C2H6  RC  SP  PC  HCN(v1,v2,v3) + C2H5, H o 298 = -25.6 kcal mol where the standard enthalpy of reaction (298 K) was obtained from the compilation (Active Thermochemical Tables) of heats of formation of the individual species. While kinetically this reaction has been widely studied, both experimentally (see compilation in the NIST chemical kinetics database, from 1965 to 2013), and theoretically, the dynamics interest has been scarce, and to the best of our knowledge, no dynamics theoretical works have been reported. Copeland et al. in 1992 and Morris et al. in 1994, reported experimental studies at room temperature on the product HCN(v1,v2,v3) vibrational populations, as an example of heavy-light-heavy hydrogen abstraction reactions, using time resolved infrared fluorescence. These authors found appreciable vibrational excitation of all the modes, i.e., pure stretches (CN, CH) and bending or combination of these vibrations. Later, in 1995, Bethardy et al. , using time-resolved infrared absorption spectroscopy at 294±2 K, reported results in disagreement with the previous measurements. They found that pure stretch and combination of stretching vibrations, HCN(v1,0,v3), for the ground-state bending vibrational state, are not initially populated, or the population is <1%. All experimental studies reported that given the high exothermicity of the reaction, many vibrational states appeared populated, each with a low population.