Bond-forming and electron transfer reactions following collisions of CF22+ with H2X (X = O, S)

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

“…The relative intensities of these channels were 0.5:69:100:0.2:0.05 for reactions ͑3͒-͑7͒, respectively. These relative intensities are broadly in line with those product ion intensities reported by Kearney and Price 27 for reactions ͑3͒-͑6͒, given that these earlier experiments did not detect ions derived from the neutral molecule ͑e.g., H 2 O ϩ ) with the same efficiency as ions derived from the dication. As mentioned above, this publication will focus on the dynamics of the bond-forming reactions ͓Eqs.…”

“…͑5͒ and ͑6͔͒ channels that have been detected before in this collision system. 27,28 However, the coincidence spectra also revealed signals corresponding to a previously unobserved bond-forming channel ͓Eq. ͑7͔͒ generating HCF 2 ϩ ϩH ϩ ϩO.…”

“…Indeed, the presence of such excited states in beams of CF 2 2ϩ has been deduced from modeling of the electron transfer reactivity of this dication. 27,40,41 If an excited triplet state of CF 2 2ϩ is indeed responsible for the formation of HCF 2 ϩ , as we deduce above, then the formation of ground-state products would be a spin-allowed process, in contrast to a spin-forbidden process from the singlet ground state of CF 2 2ϩ . This consideration of spin conservation provides further evidence in favor of the formation of HCF 2 ϩ by an excited triplet state of CF 2 2ϩ .…”

Ionisation of PF3: absolute partial electron ionisation cross sections and the formation and reactivity of dication states

“…To ensure spectra are able to distinguish between the products of the desired collisions and those with any background gas in the vacuum chamber, or any products from the metastable decay of the projectile dication, spectra are recorded both with and without the collision gas present. 41 This procedure involves subtracting the appropriately normalized contribution from a series (at least two) of ''gas-off'' spectra from the relative ion intensities from interspersed (again at least two) ''gas on'' spectra to give values for the corrected relative product ion intensities at a given collision energy. At least three such determinations are performed at each collision energy for each collision gas.…”

Electron transfer and bond-forming reactions following collisions of I2+with CO and CS2

“…[14,49] The above model has allowed the satisfactory rationalisation of dicationic SET in a number of different collision systems. [19,20,57] For collisions of I 2+ with CO and CS2, we have used this model to estimate the SET cross sections for populating the accessible electronic states of the product monocations to explain the reactivity we observe.…”