Reaction dynamics of the dichlorocarbene anion using tandem mass spectrometry

✍ Scribed by Bernard Leyh; Pierre Mélon

• Publisher: John Wiley and Sons
• Year: 1993
• Tongue: English
• Weight: 920 KB
• Volume: 28
• Category: Article
• ISSN: 1076-5174
• DOI: 10.1002/oms.1210280508

✦ Synopsis

The dissociation dynamics of CCI,-anions were studied under various internal energy conditions. This study involved the measurement of daughter-ion spectra and branching ratios and of the amount of kinetic energy released (KER) on the fragments. The competition between C and CI loss for CCI,ions created by any of the following sequence of processes:

was particularly investigated. For process (l), the amount of fragmenting CCI,ions is 8-10 times larger with Kr than with Xe or C6H6. The KER for CI loss is smaller than 0.20 eV with the three target gases used. For the loss of C, the KER is much larger (0.7 eV). This KER is, however, equal to 0.21 eV for the collisionally activated C loss in process (2). For this latter process, the C loss us. CI loss branching ratio decreases with increasing internal energy. The KERs measured for process (3) are very similar to those obtained for process (1). It is suggested that repulsive or slightly bound excited states which correlate directly to the C1,-(X2&+) + C asymptote and which are vibronically coupled to the ground state play an important role in these dissociation processes, two possible geometries for CCl, -. Recently, Gutsev