Dynamics of chemical reactions of doubly-charged ions. CF2D+ formation in collisions of CF22+ and D2

Bond-Forming Chemistry in the Gas-Phase Reactions of Atomic and Molecular Dications and Trications

“…70 Stimulated by this observation, Dolejsek et al 42 undertook a crossed-beam investigation of the angular scattering involved in the formation of DCF 2 + from the reaction of CF 2 2+ with D 2 : CF 2 2 + + D 2 ! DCF 2 + + D + [8] The angular distribution of the DCF 2 + product again showed strong forward scattering, pointing toward a largely impulsive reaction mechanism, where the dication flies past the neutral, grabbing a D À as it passes.…”

“…Initial crossed-beam investigations of this SET reactivity confirmed this picture of the dynamics, revealing experimentally the strong forward scattering that should result from such a reaction mechanism. 42,43 This strong forward scattering means that the velocity of the monocation derived from the dication (e.g., OCS + above) is strongly oriented in the same direction as the initial velocity of the reactant dication. This form of scattering dynamics was also clearly revealed by studies of SET using the coincidence apparatus described earlier.…”

“…[4], making them ideally suited for investigation using a coincidence approach. 42 In the current implementation of these coincidence techniques to investigate the dynamics of the bimolecular reactivity of dications ( Figure 5), an approach that bears some similarity to the reaction microscope experiment, 73 a pulsed beam of energy-selected ions, containing the dication of interest, is generated from a specially designed ion source. 69 The dication under study is then selected from this ion beam using a velocity filter, and the pulses of dications (duration <1 ms and frequency % 30 kHz) are then electrostatically decelerated and allowed to interact with a jet of the neutral reactant in a field-free interaction region.…”

“…Such measurements can be transformed to display the scattering of the products in the center-of-mass (CM) frame. 25,26,[41][42][43] In the CM frame, such angular scattering measurements can be interpreted to provide information on the reaction mechanism. Other crossed-beam experiments for the investigation of the low-energy reactivity of dications possess most of the features of the representative experiment described above.…”

Experimental studies of the dynamics of the bond-forming reactions of CF22+ with H2O using position-sensitive coincidence spectroscopy

“…6 Over the last 10 years, mass spectrometric experiments involving isotopic substitution, and experiments employing more advanced methodologies, coupled with high-level quantum chemical investigations have allowed significant insight into the dynamics and kinematics of the bond forming reactions of molecular dications. The dynamics of the formation of HCF 2 ϩ following collisions with H 2 have been investigated by angular scattering measurements 7,8 and studying the effect of isotopic substitution. 9,10 These measurements indicated that a collision complex may be involved in the reaction pathway.…”