Dicarbo-closo-dodecaboranes C2B10H12 and their derivatives

Article Abstract:

The synthesis of dicarbo-closo-dodecaboranes involves the reaction of decarborane with acetylenes in the presence of Lewis bases. Carboranes undergo electrophilic substitution reactions at both the carbon and boron centers without deforming the skeletal cage, a property that classifies them as pseudoaromatics. The various synthetic routes to C-substituted organophosphorus and organometallic derivatives as well as B-substituted and tricoordinated transition and non-transition metal derivatives of carboranes are discussed along with their properties.

Usage, Acetylene, Borane

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Chemistry of beta-(acyloxy)alkyl and beta-(phosphatoxy)alkyl radicals and related species: radical and radical ionic migrations and fragmentations of carbon-oxygen bonds

Article Abstract:

Alkyl radical reactions involving homolytic breakage and formation of carbon-oxygen bonds are important in biological systems and synthetic chemistry. Fragmentation reactions may occur by purely radical mechanisms, or by radical-ionic processes. Ionizing radiation of water produces hydroxyl radicals responsible for cleavage of oligonucleotides. Stereochemical labeling with isotopes allows reaction pathways to be identified.

Radicals (Chemistry), Esters, Rearrangements (Chemistry)

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Organoboranes as a source of radicals

Article Abstract:

This article describes the basic radical reactivity of organoboranes toward generating carbon-centered radicals via cleavage of carbon-boron bonds. Research interests in the utilization of organoboranes as radical initiators and radical precursors are also discussed.

Switzerland, Alkylation, Alkylation (Petroleum refining), Halogenation, Organoboranes

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