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Titolo:
Application of the NOE experiment to the analysis of boron hydride derivatives: confirming the assignments of the pseudocloso-complex [1,2-Ph-2-3-{Cp*}-3,1,2-IrC2B9H9] (Cp* = eta(5)-C5Me5) and the closo-compounds 1-Ph-1,2-C2B10H11 and 1-Ph-2-Me-1,2-C2B10H10
Autore:
Reed, D; Welch, AJ; Cowie, J; Donohoe, DJ; Parkinson, JA;
Indirizzi:
Univ Edinburgh, Dept Chem, Edinburgh EH9 3JJ, Midlothian, Scotland Univ Edinburgh Edinburgh Midlothian Scotland EH9 3JJ Midlothian, Scotland Heriot Watt Univ, Dept Chem, Edinburgh EH14 4AS, Midlothian, Scotland Heriot Watt Univ Edinburgh Midlothian Scotland EH14 4AS lothian, Scotland
Titolo Testata:
INORGANICA CHIMICA ACTA
fascicolo: 1-2, volume: 289, anno: 1999,
pagine: 125 - 133
SICI:
0020-1693(19990615)289:1-2<125:AOTNET>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
NMR; CHEMISTRY; SPECTROSCOPY;
Keywords:
boron; iridium; nuclear magnetic resonance; overhauser effect;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
15
Recensione:
Indirizzi per estratti:
Indirizzo: Reed, D Univandinburgh, Dept Chem, W Mains Rd, Edinburgh EH9 3JJ, Midlothian, Scotl Univ Edinburgh W Mains Rd Edinburgh Midlothian Scotland EH9 3JJ tl
Citazione:
D. Reed et al., "Application of the NOE experiment to the analysis of boron hydride derivatives: confirming the assignments of the pseudocloso-complex [1,2-Ph-2-3-{Cp*}-3,1,2-IrC2B9H9] (Cp* = eta(5)-C5Me5) and the closo-compounds 1-Ph-1,2-C2B10H11 and 1-Ph-2-Me-1,2-C2B10H10", INORG CHIM, 289(1-2), 1999, pp. 125-133

Abstract

The NOE experiment is demonstrated here as a viable tool in the NMR analyses of substituted borane and heteroborane compounds. We demonstrate that the saturation of H-1 NMR signals assigned to a substituent ligand can give rise to enhancements of signals arising from B-H's within a borane cage. These enhancements, though small (ca. 1-2%), are clearly detectable and have been used to confirm assignments for the pseudocloso -complex [1,2-Ph-2-3-{Cp*}-3, 1,2-IrC2B9H9] (CP* = eta(5)- C5Me5), the mono-substituted closo-carbaborane 1-Ph-1,2-C2B10H11 and the di-substituted closo-carbaborane 1-Ph-2-Me-1,2-C5B10H10. We compare the results of applying three alternative experimental NOE procedures to these problems, namely phase sensitive 2D NOESY, 1D truncated driven NOE and 1D DPFGSE-NOE. The differences between the quality and relevance of these procedures to the study of borane and heteroborane derivatives are discussed. (C) 1999 Elsevier Science S.A. All rights reserved.

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Documento generato il 11/07/20 alle ore 20:56:56