Download e-book for kindle: Carboranes, Second Edition by Russell N. Grimes

By Russell N. Grimes

ISBN-10: 012374170X

ISBN-13: 9780123741707

Carboranes moment variation is designed as a complete resource of knowledge in a box that has skilled huge, immense development in either its primary and utilized points within the 4 a long time because the e-book of Carboranes (1970). in this lengthy interval hundreds of thousands of unique study papers have seemed, besides many assessment articles and publication chapters facing facets of carborane chemistry. As carborane technological know-how has grown in complexity, and functions have complicated progressively in components akin to medication, nanostructured and electroactive fabrics, catalysis, polymers, and others, the necessity for a monograph overlaying the full sector in a unified remedy has turn into more and more obvious. This quantity has important goals, the 1st of that is to supply a readable and concise creation to the fundamental ideas underlying the synthesis, buildings, reactivity, and functions of carboranes and metallacarboranes at a degree compatible for readers in and academe who're now not informed in boron chemistry yet locate themselves operating with, or lecturing approximately carboranes. Secondly, the ebook furnishes a trove of particular details for staff energetic in carborane technology and linked applied sciences. thus, it contains tables directory millions of particular compounds keyed to literature references (supplemented via additional info on hand on a website), including greater than 2,000 molecular constitution drawings that light up the accompanying dialogue. Thorough therapy of the synthesis, constructions, and reactions of carboranes, heterocarboranes, and metallacarboranes within the first thirteen chapters is via 4 chapters detailing advances in useful purposes in polymer technology, catalysis, medication, and different components. over 2,000 molecular constitution drawings remove darkness from the textual content all through tables directory millions of compounds with key literature references supplemental details at the book's web site

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Extra resources for Carboranes, Second Edition

Sample text

Curiously, this compound is the only reported metal complex of CB5H9 or any of its derivatives (contrasting sharply with the hundreds of known metal complexes of the nido-2,3-C2B4 system). H B H H H C B H B H B H 4-20 B H Et3P PEt3 Pt H Some chemistry of the peralkylated derivative 2-MeCB5Et5H3 has been investigated [61]. The compound reacts with 2H2 2B bridging proton) and forming a salt assumed to be NaþBHEt3À, releasing H2 (presumably via abstraction of a B2 NaþMeCB5Et5H2À, which has not been characterized; acidification of this salt with HCl or DCl regenerates the neutral carborane and its monodeuterated form, respectively.

While it is not unreasonable to view twodimensional C2BHn (borirenes and boriranes) and similar three-membered ring systems [1–4], as carboranes (even CBHn species have been so labeled [5,6]), these small molecules are more commonly described as classical organoboranes. For our purposes, we define carboranes as carbon-boron clusters of four or more vertexes in which nonclassical (electrondelocalized multicenter) bonding plays a significant role. In all but a few cases, this definition clearly separates the carboranes from conventional organoboranes whose hydrocarbon-like structures can be described entirely in terms of 2c2e bonds.

2 Structure and bonding The trigonal pyramidal cluster geometry of 1,5-C2B3H5 is established from electron diffraction data on the parent compound [73] and from X-ray studies of substituted derivatives [27,66,72,74] (Table 4-4). This cage system is unique in the C2BnÀ2Hn closo-carborane series, in that it can be represented both as a classical tricyclic organoborane lacking any direct B2 2B bonding interactions, or as a nonclassical electron-delocalized cage in common with ˚ ) and electron density maps showing no charge accuother carboranes.

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Carboranes, Second Edition by Russell N. Grimes


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