Carboranes by Russell N. Grimes PDF

By Russell N. Grimes

ISBN-10: 0123032504

ISBN-13: 9780123032508

Carboranes, 3rd Edition, by means of Russell Grimes, is the definitive source at the topic. thoroughly up-to-date with a wealth of analysis and assessment articles released during this energetic box because the prior quantity was once published in 2011, the e-book offers a readable and concise creation to the fundamental ideas underlying the synthesis, buildings, and reactions of carboranes, heterocarboranes, and metallacarboranes. Following the dear foundational details, the publication explores the advances in sensible functions for the various parts within which specialists have came upon that carboranes find the money for new chances for fixing difficulties and advancing the technological know-how. those disciplines comprise polymer technology, catalysis, biomedicine, nanomaterials, and others.

  • Includes over 2,000 molecular constitution drawings during the text
  • Features accelerated assurance on functions of carboranes, quite in biomedicine and nanomaterials, given the expansion of study in those areas
  • Presents prolonged and up-to-date tables, directory millions of compounds with key literature references, supplied on-line through the book’s website
  • Explores the advances in sensible purposes for the various components during which specialists have stumbled on that carboranes have enough money new chances for fixing difficulties and advancing the science

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No such species have been reported at this writing. * Formal removal of an apical BH 2+ unit (in the manner of Lipscomb's ring-polar separation (Section 2-3)) from C 3 B 3 H 6 ~ generates the hypothetical planar species C 3 B 2 H5 _ , which is isoelectronic with C 5 H 5 ". 30 3. THE SMALL N/DOCARBORANES TABLE 3-2 DERIVATIVES OF THE SMALL TV/V/O-CARBORANES Compound 2-CB5H9 derivatives 5 Parent I-CH3 2-CH3 3-CH3 4-CH3 2,B-(CH 3 ) 2 2,B'-(CH 3 ) 2 2-CH 3 -B-(C 2 H 5 ) 5 2-C 2 H 5 Data a References B, H, MS, IR B, H, MS, IR B, H, MS, IR B, H, MS, IR B, H, MS IR, MS IR, MS IR, B, H, MS IR, MS, B, H 54a, 54a, 54a, 54a, 226 107 107 94 228 IR, MS B,H IR, B, H IR, H B, H, MS B, H, MS IR, B, H, MS IR, B, H, MS B, H, MS B, H, MS H B, H B,H IR, B, H, MS, VP IR, B, H, MS, VP 224 221, 222, 230, 351 227 107, 222 227 227 107, 224, 229 227 227 227 229 222 222 289 289 2,3,4-C 3 B 3 H 7 derivatives Parent 2-CH 3 2,3-(CH 3 ) 2 2,4-(CH 3 ) 2 2-C 2 H 5 -3,4-(CH 3 ) 2 IR, IR, IR, IR, IR, 157 24,106, 107 24, 106, 107 24, 106, 107 107 2,3,4,5-C 4 B 2 H 6 derivatives (C 2 H 5 ) 6 l,2,3,6-(C 2 H 5 ) 4 -4,5-(CH 3 ) 2 IR, B, H, Raman, MS IR, B, H, Raman, MS 17 17 1,2-C2B3H7 IR, B, H, MS 78a 2,3-C 2 B 4 H 8 derivatives Parent 1-CH3 2-CH3 4-CH 3 5-CH3 2,3-(CH 3 ) 2 1,2,3-(CH3)3 2,3,4-(CH 3 ) 3 2,3,5-(CH 3 ) 3 2-n-C3H7 2-C 6 H 5 2-Isopropenyl 4-Br (mp -69°) 4-C1 (mp -74°) B, H, MS MS, B, H MS, B, H MS, B, H MS, H 55 55 226 226 a IR = infrared spectrum or band positions; MS = mass spectrum (partial or complete) or cutoff m/e value; B = n B N M R data; H = proton N M R data; VP = vapor pressure data.

THE INTERMEDIATE CLO S O CARBORANES The use of boranes as precursors to intermediate-size carboranes may increase as studies of the relatively new octaboranes and nonaboranes progress. Until very recently, B 9 H 15 was the only identified boron hydride having seven to nine boron atoms and little was known of its chemistry. However, recent investigations of this hydride (38, 48, 52) and the isolation of iso-B9H15 (51, 52), B 8 H 12 (48, 53, 64, 65), B 8 H 14 (53), and B 8 H 18 (JO, 324) suggest new routes to the carboranes based on these compounds.

In the presence of B 2 D 6 the boron-bonded H atoms in C 2 B 3 H 5 are replaced by deuterium (273). Several alkyl derivatives are known (Table 4-2), which in general have significantly greater thermal stability than the parent compound. For example, l,5-(CH3)2-2,3,4-(C2H5)3-l,5-C2B3 is unreactive with air at 171° and is not oxidized by H 2 0 2 at 100° (188) [in contrast, 1,5-C2B3H5 slowly decomposes to tan solids and H 2 at 150° in vacuo (222)]. 1,2-C2B3H5 The parent compound (Fig. 2-lb) is unknown, but a C,3-dimethyl derivative has been isolated in 10-mg quantity and characterized with reasonable certainty from U B and lH NMR, infrared spectra, mass spectra, and chemical studies (103-105,108).

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Carboranes by Russell N. Grimes

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