M. Farnik et al., BEAM SCATTERING INVESTIGATION OF HYDRIDE-ION TRANSFER PROCESSES - REACTION CH3+ AND CD3+ WITH C2H(6), Chemical physics letters, 216(3-6), 1993, pp. 458-464
The dynamics of the hydride-ion transfer between CH3+ (or CD3+) and C2
H6 was investigated in a crossed-beam scattering experiment at the col
lision energy of 1.7 eV (c.m.). Formation of an osculating intermediat
e complex of a mean lifetime of about 1 ps was inferred from the scatt
ering data. The reaction of CD3+ leads to the ion products C2H5+ and C
2H2D3+ formed practically without H, D scrambling. The mechanism of th
e process is viewed as a formation of a protonated propane intermediat
e which decomposes from its critical configuration (CH3-H-CH2-CH3)(+)
by splitting off a neutral methane molecule on either one or the other
end with respect to the reactant ion attack.