Electron sources classification table

The best electron sources are electron rich, like anions and lone pairs, such that no bonds need be broken to use them as electron sources. Other excellent electron sources are highly ionic sigma bonds and pi bonds polarized by excellent electron-releasing groups. Table 5.2 repeated below shows the common electron sources, and Figure A.l shows a flowchart of the classification process. 

Electron sinks have a full, partial, or inducible plus charge on the atom that gets attacked by the electron source. The larger the partial plus is, the better the electron sink can attract a negatively charged electron source. Table 6.2 repeated below gives the common electron sinks, and Figure A.l shows a flowchart of the classification process. 

Two classifications of field emitters are used in electron microscopes, cold and Schottky sources (Table 7.2). Whereas the former operates through electron... 

Table 2 Classification terms for nticrobial metabolism. Each term is composed of modifiers for the source of energy (chentical versus fight), the source of electrons (inorganic versus organic), and the source of carhon (inorganic versus organic). The modifiers are linked in the order energy-electrons-carhon. Metabolisms for which organic carhon is hoth the carhon and energy source are abbreviated as heterotrophy. ...

Two classifications of field emitters are used in electron microscopes, cold and Schottky sources (Table 7.2). Whereas the former operates through Fowler-Nord-heim electron tunneling " from a cathode wire held at room temperature, the latter features thermionic emission from a Zr02-coated sharpened W filament at 1,800 K. In both cases, an electrical field draws electrons from the narrow filament tip into an... 

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See also in sourсe #XX -- [ ]

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