Of coordinated oxygen

The EPD properties of coordinated oxygen are also exemplified by the polymerization of sulfur trioxide ... 

Antibiotic Cation Number of coordinating oxygen atoms ) /approximate symmetry of coordination sphere Approximate shape and size of complex Ref. 

The gas phase oxidation of ethylene to ethylene oxide over silver catalysts has been studied extensively.49 la-c It has been suggested that epoxide formation involves transfer of oxygen from a silver-oxygen complex to the olefin on the catalyst surface.4913 Silver-on-silica also catalyzes the liquid phase oxidation of cumene to cumene hydroperoxide. A mechanism that involved insertion of coordinated oxygen into a C—H bond was proposed630 ... 

Of much less importance than the two points of difference mentioned above, the difference in the relative numbers of coordinated oxygen ions may be put forward, whereby a larger number by their combined effect leads to a stronger bonding and thus to smaller acid strength. 

Metal-oxygen intermediates react with inorganic or organic substrates via various reaction pathways, such as oxygen atom transfer, hydrogen atom transfer, hydride transfer, electron transfer, proton-coupled electron transfer, free radical reactions, and others.14-16 The preferential reactivity pathways depend on the nature and oxidation state of the metal, the nuclearity of the complex, and the coordination mode and protonation state of coordinated oxygen-derived ligand(s). 

The Mossbauer isomer shifts and quadrupole splittings are primarily determined by the number and spatial arrangement of coordinated oxygens the identity of the nearest neighbor metal ion (Fe or Co) is of less importance. 

The Q notation indicates silicon tetrahedrally coordinated by four oxygens. The superscript gives the number of coordinated oxygens which are part of siloxy bridges. 

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