I General introduction.- III General symbols and abbreviations.- 13.1 Introduction.- 13.2 Phosphinyl radicals X2P• and related species.- 13.3 Phosphonyl (X2P•=O) and thiophosphonyl (X2P•=S) radicals.- 13.4 Phosphoranyl radicals X4P•, including related species.- 13.5 Phosphoniumyl cation radicals X3P•+, phosphine dimer cation radicals X3P•P+X3, phosphate anion radicals, and related species.- 13.6 Miscellaneous.- 14 Radicals centered on other heteroatoms.- 14.2.1 Thiyl radicals of the type RS•, R-S•R, R-S•-R2.- 14.2.2 Sulfinyl radicals of the type R-S•=O.- 14.2.3 Sulfonyl radicals of the type RS•O2.- 14.2.4 Sulfuranyl radicals of the type X-S•-R2, X2-S•-R, S•X3, S•X4.- 14.2.5 Disulfide radicals of the type R-S-S•.- 14.2.6 Cation radicals.- 14.2.7 Anion radicals.- 14.3.1 Silyl radicals X3Si•.- 14.3.2 Silyl radicals from polysilanes.- 14.3.3 Silicon-centered anion radicals.- 14.3.4 Silicon-centered anion radicals from polysilanes.- 14.3.5 Silicon-centered cation radicals.- 14.4.1 Germyl radicals X3Ge•.- 14.4.2 Germanium-centered anion radicals.- 14.4.3 Germanium-centered cation radicals.- 14.5.1 Stannyl radicals X3Sn•.- 14.5.2 Tin-centered anion radicals.- 14.5.3 Tin-centered cation radicals.- 14.6.1 Boryl radicals X3B•.- 14.6.2 Boron-centered anion radicals.- 14.6.3 Boron-centered cation radicals.- 14.7.1 Aluminum-centered neutral radicals.- 14.7.2 Aluminum-centered anion radicals.- 14.8.1 Gallium-centered neutral radicals.- 14.8.2 Gallium-centered radical anions.- 14.9.1 Cation radicals.- 15.1 Introduction.- 15.2.1 Hydrocarbon radical anions.- 15.2.2 Substituted compounds.- 15.3.1 Oxygen containing heterocycles.- 15.3.2 Nitrogen containing heterocycles.- 15.3.3 Sulphur containing heterocycles.- 15.3.4 Phosphorus containing heterocycles.- 15.3.5 Selenium and tellurium containing heterocycles.- 15.3.6 Heterocycles with two or more different heteroatoms.- 15.4 Anion radicals from nitro compounds.- 15.5.1 Esters and thioesters.- 15.5.2 Aldehydes, ketones and their thio analogs.- 15.5.3 Semidiones.- 15.5.4 Acid anhydrides and derivatives.- 15.6.1 Aliphatic azoalkenes.- 15.6.2 Benzo[c]cinnolines and azobenzene derivatives.- 15.6.3 Arylazophosphonates.- 15.6.4 Bidiazines.- 15.6.5 Tetrazines.- 15.7.1 Sulphides and sulphones.- 15.7.2 Imines and imides.- 15.7.3 Fullerenes.- 15.7.4 Tetracyanoquinodimethanes.- 15.7.5 Phenylcarbonitriles.- 15.7.6 Phosphaalkenes.- 15.7.7 Silanes.