However, the similar coordination environments of the dioxygen ( 1 ), nitrosobenzene ( 2 ), diazene ( 3 ), and styrene ( 4 ) complexes allowed for a comparison of the often-obscured edge positions for these compounds, which, as expected, showed a trend to lower copper oxidation states as the combined electronegativity of the coordinating atoms decreased ( 1 → 4 ).
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Re-evaluating the Cu K pre-edge XAS transition in complexes with covalent metal-ligand interactions.
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