Sequential bond energies of Cr(CO)x+, x = 1-6

Farooq A. Khan, D. E. Clemmer, Richard H. Schultz, P. B. Armentrout

Research output: Contribution to journalArticlepeer-review

266 Scopus citations

Abstract

The sequential bond energies of Cr(CO)x+, x = 1-6, are determined by collision-induced dissociation in a guided ion beam tandem mass spectrometer. Values for the 0 K bond energies (in eV) are determined to be D(Cr+-CO) = 0.93 ± 0.04, D[(CO)Cr+-CO] = 0.98 ± 0.03, D[(CO)2Cr+-CO] = 0.56 ± 0.06, D[(CO)3Cr+-CO] = 0.53 ± 0.08, D[(CO)4Cr+-CO] = 0.64 ± 0.03, and D[(CO)5Cr+-CO] = 1.35 ± 0.08. The sum of these bond dissociation energies, 4.99 ± 0.14 eV, is in good agreement with literature thermochemistry. The observation that the relative bond strengths vary nonmonotonically with the number of ligands is discussed in terms of spin conservation and ligand field theory. The bond energy for Cr+-Xe is also determined as 0.7 ± 0.1 eV and compared with values for other transition metal ion rare gas species.

Original languageEnglish
Pages (from-to)7978-7987
Number of pages10
JournalJournal of Physical Chemistry
Volume97
Issue number30
DOIs
StatePublished - 1993
Externally publishedYes

Fingerprint

Dive into the research topics of 'Sequential bond energies of Cr(CO)x+, x = 1-6'. Together they form a unique fingerprint.

Cite this