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Updated: May 10, 2025

The Synthesis, Characterization and Reactivity of a Series of Ruthenium N-triphosPh Complexes
Published on: April 10, 2015
Structural Rearrangement in Cyclic Cu(II) Pyridyltriazole Complexes: Oxidation of Dabco to Oxalate and CO2 Conversion
Uttam R Pokharel1, Frank R Fronczek2, Andrew W Maverick2
1Department of Physical & Applied Science, University of Houston-Clear Lake, Houston, TX 77058, USA.
Abstract:
Structural rearrangements in metal-organic supramolecules constructed from the coordination of Cu(II) with m-xpt (m-xylylenebis(pyridyltriazole)) are investigated upon their interaction with 1,4-diazabicyclo[2.2.2]octane (dabco) and carbon dioxide-enriched air. The binuclear [Cu2(m-xpt)2]4+ complexes react with dabco to produce a carbonate-bridged trinuclear complex, [Cu3(m-xpt)3(µ-CO3)]4+, and an oxalate-bridged binuclear complex, [Cu2(m-xpt)2(µ-C2O4)]2+, where carbonate and oxalate likely originate from CO2 and dabco, respectively. The trinuclear complex reassembles the original dimer upon the removal of the carbonate ion. Similarly, polymeric [Cu(o-xpt)(PF6)]n, formed from Cu(I) and o-xpt (o-xylylenebis(pyridyltriazole)) coordination, undergoes oxidation in CO2-enriched air to yield a tetranuclear Cu(II) complex, Cu4(o-xpt)3(μ4-CO3)(μ2-OH)(μ2-OCOCH3)4+. The reaction progress is monitored by UV-Vis spectroscopy, and the major products are characterized by single-crystal X-ray diffraction.
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