Boron selenium compounds

Conrad O, Jansen C, Krebs B (1998) Boron - Sulfur and Boron - Selenium compounds -From unique molecular structural principles to novel polymeric materials. Angew Chem IntEd37 3208-3218... 

C.R. Johnson, Sulfoximides, in D. Barton u. W.D. Ollis, Comprehensive Organic Chemistry, Bd. 3, D.N. Jones, Sulphur, Selenium, Silicon, Boron, Organometallic Compounds, S. 223, Pergamon Press, Oxford New York Toronto Sydney Paris - Frankfurt 1979. 

Jones, Sulphur, Selenium, Silicon, Boron, Organometallic Compounds, S. 237, Pergamon Press, Oxford New York Toronto. Sydney Paris Frankfurt 1979. 

Boron, Phosphorus, and Selenium Compounds. Oxone has been used to oxidize carbon-boron bonds during the work-up of hydroboration reactions to obtain high yields of the resultant alcohols (eq 73). Aqueous Oxone/acetone oxidizes electron-poor and electron-rich aromatic and aliphatic boronic acids and esters to the corresponding alcohols rapidly and efficiently (eq 74). A one-pot procedure for the synthesis of iweta-substituted phenols from benzenes has been developed, and a similar strategy has been devised for the synthesis of Boc-oxindoles from Boc-indoles. i3i... 

Besides the energy and carbon sources, microorganisms also need the so-called supplementary materials. These are bound nitrogen, phosphoric and sulfuric compounds, potassium, calcium, magnesium, and iron, as well as trace elements (sodium, chlorine, manganese, molybdenum, zinc, copper, cobalt, nickel, vanadium, boron, selenium, tungsten, etc.) and eventually aminoacids, vitamins, purines, pyrimidines, etc. [for identification, see Ehrlich (1996)]. 

Chemistry and structural chemistry of important oligomeric and polymeric chalcogen compounds of main group elements novel sulphide ionic conductors development of boron-sulphur and boron-selenium... 

Sihcon and boron bum ia fluorine forming siUcon tetrafluoride [7783-61-17, SiF, and boron trifluoride [7637-07-2] respectively. Selenium and tellurium form hexafluorides, whereas phosphoms forms tri- or pentafluorides. Fluorine reacts with the other halogens to form eight interhalogen compounds (see Fluorine compounds, inorganic-halogens). 

In Group 15 (V), nitrogen compounds readily form molecular compounds with BF. Phosphoms compounds also form adducts with BF. Inorganic or organic compounds containing oxygen form many adducts with boron trifluoride, whereas sulfur and selenium have been reported to form only a few (41—43). 

Laser isotope separation techniques have been demonstrated for many elements, including hydrogen, boron, carbon, nitrogen, oxygen, sHicon, sulfur, chlorine, titanium, selenium, bromine, molybdenum, barium, osmium, mercury, and some of the rare-earth elements. The most significant separation involves uranium, separating uranium-235 [15117-96-1], from uranium-238 [7440-61-1], (see Uranium and uranium compounds). The... 

Oxidative reactions frequently represent a convenient preparative route to synthetic intermediates and end products This chapter includes oxidations of alkanes and cycloalkanes, alkenes and cycloalkenes, dienes, aromatic fluorocarbons, alcohols, phenols, ethers, aldehydes and ketones, carboxylic acids, nitrogen compounds, and organophosphorus, -sulfur, -selenium, -iodine, and -boron compounds... 

Unsaturated compounds containing both a double bond and a charactensbc group such as hydroxyl, carbonyl, or nitnle or an organophosphorus, -selenium sulfur, -iodine, or -boron group are also included in this section even when only the double bond IS oxidized... 

The methods available for synthesis have advanced dramatically in the past half-century. Improvements have been made in selectivity of conditions, versatility of transformations, stereochemical control, and the efficiency of synthetic processes. The range of available reagents has expanded. Many reactions involve compounds of boron, silicon, sulfur, selenium, phosphorus, and tin. Catalysis, particularly by transition metal complexes, has also become a key part of organic synthesis. The mechanisms of catalytic reactions are characterized by catalytic cycles and require an understanding not only of the ultimate bond-forming and bond-breaking steps, but also of the mechanism for regeneration of the active catalytic species and the effect of products, by-products, and other reaction components in the catalytic cycle. 

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