THE DYNAMICS OF THE MOLECULAR BEAM REACTIONS Ba + C2H6Br, n-C3H1Br, 1,2-C2H4Br2, 1,3-C3H6Br2

Under single-collision beam-gas scattering conditions the reactions Ba + C2H6Br, n-C4H2Br, 1,2-C2H4Br2, 1,2,C3H2Br2 have been studied using laser induced fluorescence to letter the B2Br (XE+)-E-2 product. The vibrational distributions, the fractions of the available energy going into vibrational and rotational energy of the BaBr products have been calculated by means of computer simulation. It has been found that the average vibrational energies of the Bar products can be described as a linear function of the mass factors for the reactions Ba + CH2Br, C2H5Br, n-C3H7Br, 1,3- C3H6Br2, and that the potential energy surfaces for thesc reactions are similar. For the reactions Ba +CH3Br, C2H2Br, n-C2H7Br, the vibrational excitations of the BaBr products increase slightly when the number of the carbons increase, but for the reactions Ba + CH2Br2, 1,2-C2H4Br2, 1,3-C2H6Br2 the vibrational excitations of the BaBr products decrease greatly when the number of the cartons increase.