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On the Hydrogen Oxalate Binding Motifs onto Dinuclear Cu and Ag Metal Phosphine Complexes

Kwasigroch, Björn; Khuu, Thien; Perez, Evan H.; Denton, Joanna K.; Schneider, Erik K.; Straßner, Annika; Theisen, Marvin; Kruppa, Sebastian V.; Weis, Patrick; Kappes, Manfred M.; Riehn, Christoph; Johnson, Mark A.; Niedner-Schatteburg, Gereon


We report the binding geometries of the isomers that are formed when the hydrogen oxalate ((CO$_{2}$)$_{2}$H=HO$_{x}$) anion attaches to dinuclear coinage metal phosphine complexes of the form [M$_{1}$M$_{2}$dcpm$_{2}$(HOx)]$^{+}$ with M=Cu, Ag and dcpm=bis(dicyclohexylphosphino)methane, abbreviated [MM]$^{+}$. These structures are established by comparison of isomer-selective experimental vibrational band patterns displayed by the cryogenically cooled and N$_{2}$-tagged cations with DFT calculations of the predicted spectra for various local minima. Two isomeric classes are identified that feature either attachment of the carboxylate oxygen atoms to the two metal centers (end-on docking) or attachment of oxygen atoms on different carbon atoms asymmetrically to the metal ions (side-on docking). Within each class, there are additional isomeric variations according to the orientation of the OH group. This behavior indicates that HOx undergoes strong and directional coordination to [CuCu]$^{+}$ but adopts a more flexible coordination to [AgAg]$^{+}$. Infrared spectra of the bare ions, fragmentation thresholds and ion mobility measurements are reported to explore the behaviors of the complexes at ambient temperature.

Verlagsausgabe §
DOI: 10.5445/IR/1000141386
Veröffentlicht am 20.12.2021
DOI: 10.1002/chem.202102768
Zitationen: 2
Web of Science
Zitationen: 3
Zitationen: 3
Cover der Publikation
Zugehörige Institution(en) am KIT Physikalisches Institut (PHI)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 11.2021
Sprache Englisch
Identifikator ISSN: 0947-6539, 1521-3765
KITopen-ID: 1000141386
Erschienen in Chemistry - a European journal
Verlag John Wiley and Sons
Band 27
Heft 61
Seiten 15136–15146
Vorab online veröffentlicht am 27.10.2021
Nachgewiesen in Scopus
Web of Science
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