Premium
Gas‐Phase Reactions of Chromium and Chromium Fluoride Cations CrF n + ( n = 0−4) with Water and Nitrous Oxide
Author(s) -
Mazurek Ulf,
Schröder Detlef,
Schwarz Helmut
Publication year - 2002
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/1099-0682(200207)2002:7<1622::aid-ejic1622>3.0.co;2-v
Subject(s) - chemistry , chromium , fluoride , inorganic chemistry , hydroxide , hydrolysis , oxide , hydrobromic acid , fourier transform ion cyclotron resonance , ion , organic chemistry
The reactions of atomic chromium and chromium fluoride monocations CrF n + ( n = 0−4) with water and nitrous oxide were investigated by Fourier transform ion cyclotron resonance (FT‐ICR) mass spectrometry. Besides slow condensation, Cr + is unreactive towards water, whereas all chromium fluoride cations undergo at least one Cr−F bond hydrolysis yielding the corresponding hydroxide concomitant with loss of neutral HF. While hydrolysis is complete for CrF + and CrF 2 + , proton transfer and HF losses compete with the hydrolysis of the second Cr−F bond in CrF 3 + and CrF 4 + . Nevertheless, complete Cr−F bond hydrolysis is observed for the latter two cations as well. The results for the ion‐molecule reactions with nitrous oxide are as follows: With the exception of CrF 3 + , which gives CrF 3 O + in a good yield, all species investigated were found to be essentially unreactive towards N 2 O. The ionisation energy of CrF 3 O has been determined, IE = 11.3 ± 0.2 eV. In addition, limits for the standard heats of formation of several chromium‐containing cations have been derived. (© Wiley‐VCH Verlag GmbH, 69451 Weinheim, Germany, 2002)