Low temperature (39–298 K) kinetics study of the reactions of the C4H radical with various hydrocarbons observed in Titan's atmosphere

Untangling the chemical evolution of Titan's atmosphere and surface–from homogeneous to heterogeneous chemistry

“…Note that the kinetics of the 1,3-butadiynyl radical reactions with unsaturated hydrocarbons are very fast even at low temperatures relevant to Titan's atmosphere. 126 However, the reaction products are elusive. Crossed beam experiments are planned to untangle the dynamics of these reactions in a similar way as those of the important methylidyne reactions.…”

Submillimeter-wave spectrum of in the extended negative glow and hollow-anode discharges

“…Judging from this result, the reaction (3) is also expected be a fast reaction. In this context, it is worth noting that C 4 H was detected in discharges in acetylene diluted in Ar or Ne, despite the fast reaction between C 4 H and C 2 H 2 [25], and the abundance ratio ½C 4 H=½C 4 H À was about 12 in an extended negative glow discharge [14] and about 7 in a glow discharge [6]. However, although C 4 H was observed in these discharges, the abundance ratios were much smaller compared with that for the ratio ½C 3 N=½C 3 N À $ 50 in the discharge in HC 3 N [15].…”

“…However, the reaction of an isoelectronic radical, C 4 H, with acetylene was investigated by Berteloite et al [25], and this reaction proved to be one of the fastest neutral reactions. Judging from this result, the reaction (3) is also expected be a fast reaction.…”

Gas phase reactive collisions, experimental approach

“…that bridge the 'critical' value of 8.75 eV [97]. It also held for a series of reactions involving the C 4 H radical and a series of hydrocarbons [99][100][101] which were investigated later. It is then an interesting criterion to consider, especially for reactions that are not easy to investigate experimentally at very low temperatures.…”