The chemistry of coordinated NxOy ligands is of importance in biochemical as well as industrial chemical processes. Thermochemical data for addition of carbon dioxide to metal oxo complexes to form metal carbonates is available for a range of inorganic and a few organometallic complexes. Corresponding data for addition of isoelectronic nitrous oxide with metal oxo complexes to form hyponitrite complexes has not been reported. The Pt(II) hyponitrite and carbonate complexes shown in eqns. (1) and (2) both react rapidly with 1,2-dihydroxybenzene: The structure of the chelating bis-phenoxide complex is shown in Figure 1 Figure 1. Structure of Pt(PPh3)2(h 2-1,2-O2C6H4) Subtraction of equation (2) from equation (1) yields equation (3): Reaction (3) provides a direct comparison of the relative affinities of N2O and CO2 towards the presumed reaction intermediate “(PPh3)2Pt=O”. Preliminary kinetic and thermodynamic data for this system will be reported.

Solution calorimetric studies of NxOy binding to transition metal complexes

2019 Spring National Meeting

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