So, when we talked about Lewis structures, we actually assigned electrons to individual atoms or to individual bonds.
Compounds capable of accepting electrons are oxidizing agents, and those able to assign electrons are reducing agents.
This is largely a result of the ambiguity of assigning electrons to atoms, resulting in apparent violations of the octet rule; see McGrady and Steed.
These data indicate that the faster of the processes observed with the SdhB-Ile209Lys involves electron transfer between the [3Fe 4S] cluster and heme, with the much slower rate (∼47 seen seen with UQ being assigned to electron transfer between the [3Fe 4S] cluster and the quinone.
The observed bands can be assigned to electron transitions in the VO4 3− groups; those are constituents of mentioned compounds.
The immobilization of photosynthetic proteins on hematite, in particular C-phycocyanin, yields a substantial increase of the photocurrent density which can be assigned to electron hole pair formation in the protein by light absorption in a wavelength range that exceeds the absorption range of the hematite.
The simulated electron absorption wavelengths are in good agreement with experimental ones, allowing us to assign their electron transition characters with high confidence.
The two short-wavelength peaks obviously correspond to the two peaks of optical absorption spectrum, which we assign to electron-HH and electron-LH transitions.
The simulated UV Vis/CD spectra of the complex 1 are in good agreement with the experimental ones, which can be used to assign the electron transition properties and absolute configuration (AC) with high confidence.
In recent debates, Steinborn[ 5] and Loock[ 6] advocate Pauling's[ 7] approach of assigning shared electron pairs to the more electronegative atom.
Methods to unambiguously assign specific electron density to a particular protein will enable us to achieve this, and efforts are currently underway in our lab to do this.
