Pockets, localized complexation

The geometries of Mn(3-TRPyP) and Mn(4-TRPyP) species already investigated by density function theory (DPT) and molecular mechanics calculations (270, 271). They are consistent with a planar configuration for the porphyrin ring in both systems. However, while the peripheral ruthenium ions are in the same plane in the Mn(4-TRPyP) species, they are located above and below the porphyrin plane in the Mn(3-TRPyP) complex (Fig. 27), so that the stereochemical positioning of these groups provides local picket fences, or pockets, capable of influencing the accommodation of the substrates near the catalytic site. 

Oakland-Emeryville Industrial Complex. In the heavily industrialized area in Emeryville at the east end of the San Francisco Bay Bridge, pockets of metallic mercury vapor were detected at various locations on three separate visits (Figure 4). These clouds varied in concentration from 0 to 688 ng/meter. It was not possible to identify the source or sources of this mercury possible local sources include a paint plant, a chemical plant, and a scrap iron recovery facility. 

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