The studies on the reaction of Ba with CHCl~3, CCl~4 by molecular beam techniques

Abstract

On a crossed beam apparatus and on a beam-gas apparatus, the reactions Ba(3D) + CCl4 and CHCl3 and the reactions Ca(1S0), Ca(3P), Ba(3D), and Ba(1S0) + CCl4 were studied by means of chemiluminescence (CL) and laser induced fluorescence (LIF), resp. The plot of the CL cross sections of producing BaCl (A2P, B2?) from the reactions Ba(3D) + CHCl3 or CCl4 vs. collision energy were obtained. The plot for the reaction Ba(3D) + CCl4 can be described by the LOC model, and the plot for the reaction Ba(3D) + CHCl3 can be described by rigid nonspherical mols., developed by Evans and Bernstein et al. (1985). The LIF study shows that for the reaction of Ca with CCl4, the change of Ca(1S0) to Ca(3P) brought about an increase of the ground state CaCl product rotation energy; but for the reactions Ba + CCl4, the change of Ba(1S0) to Ba(3D) brought about an increase of the ground state BaCl product vibration energy, which can be explained by the impulse model of the atom-mol. reaction.

Key words: DICHLOROMETHANE, REACTION MECHANISM, CALCIUM, CARBON TETRACHLORIDE, BARIUM, BARIUM CHLORIDE, TRICHLOROMETHANE, MOLECULAR BEAM, CHEMILUMINESSENCE

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HAN KELI;HE GUOZHONG;LOU NANQUAN. The studies on the reaction of Ba with CHCl~3, CCl~4 by molecular beam techniques[J]. Acta Chimica Sinica, 1992, 50(6): 521-526.

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分子束技术研究Ba与CHCl~3, CCl~4的反应