Regular Article

Electron interactions with Bis(pentamethylcyclopentadienyl) titanium(IV) dichloride and difluoride^★,★★

¹ Department of Chemistry, University of Konstanz, Universittsstrasse 10, 78457 Konstanz, Germany
² Department of Atomic, Molecular, and Optical Physics, Faculty of Applied Physics and Mathematics, Gdańsk University of Technology, ul. G. Narutowicza 11/12, 80-233 Gdańsk, Poland
³ J. Heyrovský Institute of Physical Chemistry of the Czech Academy of Sciences, Dolejškova 3, 18223 Prague, Czech Republic

^a e-mail: jaroslav.kocisek@jh-inst.cas.cz

Received: 31 December 2017
Received in final form: 18 April 2018
Published online: 14 June 2018

Abstract

We present a combined experimental and theoretical study of the interaction of electrons with Bis(pentamethylcyclopentadienyl)titanium(IV) dichloride (Cp₂^*TiCl₂) and difluoride (Cp₂^*TiF₂). We report the experimental measurements of partial cross sections for the dissociative electron attachment (DEA) and the electron ionization (EI) mass spectra of isolated molecules. Estimates of the absolute cross sections are done on the basis of cross-calibration in the case of DEA and on the basis of binary-encounter-Bethe calculation in the case of EI. EI of both molecules is similar, concerning cross section amplitude and fragmentation pattern. DEA is different: DEA to Cp₂^*TiF₂ primarily results in the formation of stable parent anion, while DEA to Cp₂^*TiCl₂ results in the strong fragmentation, primarily into Cl⁻ anion. Possible use of the molecules as the model species for studies of DEA efficiency in postirradiation chemistry is discussed.