Marggi Poullaín, SoniaRecio Ibáñez, PedroBañares Morcillo, LuisChicharro, David V.González-Vázquez, JesúsRubio-Lago, Luis2026-02-022026-02-022019S. Marggi Poullain, P. Recio, D. V. Chicharro, L. Rubio-Lago, J. González-Vázquez and L. Bañares, Dynamics of the photodissociation of ethyl iodide from the origin of the B band. A slice imaging study, Phys. Chem. Chem. Phys., 2019,21, 14250-142601463-90761463-908410.1039/c8cp06482bhttps://hdl.handle.net/20.500.14352/131311Received 17th October 2018, Accepted 5th December 2018. S. M. P. acknowledges financial support for a postdoctoral contract (PEJD-2016/IND-3217) from the Regional Government of Madrid (Spain) through the European Social Fund and the Fondo de Garantía Juvenil. D. V. C. acknowledges a contract from Spanish MINECO under the FPI predoctoral program. This work has been financed by the Spanish MINECO (Grants No. CTQ2015-65033-P and FIS2016-77889-R). The facilities provided by the Centro de Láseres Ultrarrápidos at UCM are gratefully acknowledged.The photodissociation dynamics and stereodynamics of ethyl iodide from the origin of the second absorption B-band have been investigated combining pulsed slicFe imaging with resonance enhanced multiphoton ionization (REMPI) detection of all fragments, I(2P3/2), I*(2P1/2) and C2H5. The I*(2P1/2) atom action spectrum recorded as a function of the excitation wavelength permits one to identify and select the 000 origin of this band at 201.19 nm (49 704 cm−1). Translational energy distributions and angular distributions for all fragments and semiclassical Dixon's bipolar moments for the C2H5 fragment are presented and discussed along with high-level ab initio calculations of potential energy curves as a function of the C–I distance. A predissociative mechanism governs the dynamics where in a first step a bound Rydberg state corresponding to the 5pπI → 6sI transition is populated by the 201.19 nm-photon absorption. A curve crossing with a repulsive state located within the Franck–Condon geometry leads to direct dissociation into the major channel C2H5 + I*(2P1/2). A small amount of I(2P3/2) atoms is nevertheless observed and presumably attributed to a second curve crossing with a repulsive state from the A-band.engAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/journal articlehttps://doi.org/10.1039/C8CP06482Bhttps://pubs.rsc.org/en/content/articlehtml/2018/cp/c8cp06482bhttps://pubs.rsc.org/en/content/articlelanding/2019/cp/c8cp06482brestricted access544Química física (Física)2210 Química Física