Boron, organic derivatives

Organic ring systems are named by replacement nomenclature. Three- to ten-membered mono-cyclic ring systems containing uncharged boron atoms may be named by the specialist nomenclature for heterocyclic systems. Organic derivatives are named as outlined for substitutive nomenclature. The complexity of boron nomenclature precludes additional details the text by Rigaudy and Klesney should be consulted. 

Carbon is, of course, unique in the number of hydrides it forms, but the elements in the proximity of carbon in the Periodic Table have a similar, if more restricted, propensity to form hydrides. Silicon, germanium, boron and phosphorus are obvious examples. For hydrides of these elements, and especially for their organic derivatives, the methods of substitutive nomenclature can be applied to obtain suitable names. 

The most common organic derivatives of boron-sulfur rings are based on the three ring systems found in the binary boron sulfides, viz. the five-membered rings (RB)2S3 (9.27) and six-membered rings (RBS)3 (9.28) and, less frequently. 

Discussion Point DP3 Organic derivatives of the group 13 elements aluminium and boron are needed as essential components for almost all of the insertion-catalyzed olefin polymerizations. List four such compounds of interest and describe for each of them the structural and reactivity properties relevant to its action as activator jcocatalyst. Outline some of the features of polymerization catalysts that do not require any Al- or B-containing cocatalysts. 

Further changes adsorption characteristics of high-silica zeolite of pentasil type and ultrastable form Y zeolite modified by boron and phosphorus, both from aqueous solutions of appropriate acids and by treating of organic derivative vapors were consideration. 

Usually a synthesis of heterofuUerenes by simply reacting the carbonaceous starting material with a source of the respective heteroelement does not succeed. The reaction of graphite with boron nitride or cyanogen (CN)2, for example, does not yield the desired heterofullerene. Other methods starting from organic derivatives of fullerenes have to be considered instead. 

Boronic acids and their derivatives are very popular as components of chiral Lewis acids and promoters for various reaction processes [481]. Indeed, the chiral acyloxyb-oranes and the oxazaborolidines (Section 1.2.3.5) described in Chapter 11 made a mark in organic synthesis. Recently, Ryu and Corey extended the apphcation of chiral oxaborolidinium catalysts to the cyanosilylation of aldehydes [482]. Chiral diaz-aborohdine salts were evaluated in the enantioselective protonation of enol ethers [145]. Likewise, a tartramide-derived dioxaborolane is key as a chiral promoter in the asymmetric cyclopropanation of allyhc alcohols [483]. More examples and details on the applications of boronic add derivatives as reaction promoters and catalysts are provided in Chapter 10. 

Koski et al have studied the use of pyrolysis followed by the use of thermal conductivity cells for the determination of deuterium in deuterated boron hydrides, their organic derivatives and nitrogen compounds. The volatile boron compounds were first... 

In conclusion, the oxonium derivatives of polyhedral boron hydrides are very promising starting materials for the synthesis of various boronated organic and bioorganic materials. 

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