Reactive Intermediates

1. Current Aspects of the Solution Chemistry of Arylnitrenes.- I. Introduction.- II. Intermodular Reactions.- III. Intramolecular Reactions.- IV. Decomposition in the Presence of Protonic and Lewis Acids.- V. Current and Future Application.- References.- 2. Nitrile Ylides and Nitrenes From 2H-Azirines.- I. Generation of Nitrile Ylides.- II. Features of the Photocycloaddition Reaction of 2H-Azirines.- III. Photochemical Dimerizations of 2H-Azirines.- IV. Intramolecular 1,5-Electrocyclization Reactions of Vinyl Substituted 2H-Azirines.- V. Properties of Nitrile Ylides.- VI. Intramolecular Photocycloaddition Reactions of 2H -Azirines.- VII. Further Reactions of 2H-Azirines.- VIII. Thermal Reactions of2H-Azirines.- References.- 3. Radical Cyclizations by Intramolecular Additions.- I. Introduction.- II. General Presentation: The Early Results.- III. Attempts to Rationalize the Selectivities Observed in the Cyclization of 5-Hexenyl Radicals.- IV. Alkyl Substituted 5-Hexenyl Radicals.- V. Alkenyl Radicals Other than 5-Hexenyl.- VI. Carbon-Centered Alkenyl Radicals Containing Heteroatoms.- VII. Alkenyl Radicals Bearing Stabilizing Groups on the Carbon Radical Center.- VIII. Heteroatom-Centered Radicals.- IX. Intramolecular Addition to Other Carbon-Carbon Bonds.- X. Intramolecular Addition to Polar Multiple Bonds Such as Carbonyl or Cyano.- XI. Synthesis of Bi- and Poly cyclic Compounds. Stereochemical Features of Free Radical Intramolecular Additions.- XII. Free Radical Intramolecular Addition as a Mechanistic Tool and a Kinetic Standard.- XIII. Conclusion.- References.- 4. Reactions of Silicon Atoms and Silylenes.- I. Introduction.- II. Methods of Generation of Silicon Atoms.- III. Reaction Modes of Silicon Atoms.- IV. Modes of Formation of Silylenes.- V. Spectroscopic and Thermodynamic Properties of Silylenes.- VI. Chemical Properties of Silylenes.- References.- 5. Five-Membered Hetarynes.- I. Introduction.- II. Chemistry of Arynes.- III. Five-Membered Hetarynes.- IV. Summary.- References and Notes.- 6. A Survey of Favorskii Rearrangement Mechanisms. Influence of the Nature and Strain of the Skeleton.- I. Introduction.- II. Symmetrical Mechanisms.- III. Unsymmetrical Mechanism.- IV. The Favorskii Rearrangement in Bridged Polycyclic and Cage Compounds.- V. General Conclusion.- References.