Journal ArticleDOI
Fluorine-19 nuclear magnetic resonance studies on some polyfluroaromatic compounds and their metal complexes
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In this article, the high-resolution fluorine-19 n.m. spectra of several polyfluoroaromatic compounds and of derived transition-metal complexes are presented and discussed.Abstract:
The high-resolution fluorine-19 n.m.r. spectra of several polyfluoroaromatic compounds and of derived transition-metal complexes are presented and discussed. Substituent shielding parameters are tabulated for many commonly encountered functional groups, and details of the identification of complex products from the reaction of the anion [(π-C5H5)Fe(CO)2]– with C6F5CN, 1,2-C6F4I2 and C6F5Br are given. The nature of the complexes formed has been confirmed by use of high-resolution mass-spectrometric techniques in the latter two cases.read more
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Journal ArticleDOI
Lewis acidity of organofluorophosphonium salts: hydrodefluorination by a saturated acceptor.
TL;DR: Here, Lewis acidity and catalytic application of electronically saturated phosphorus-centered electrophilic acceptors are reported and the impressive fluoride ion affinity of this highly electron-deficient phosphonium center is demonstrated.
Journal ArticleDOI
Some transition metal complexes derived from mono- and di-ethynyl perfluorobenzenes
David J. Armitt,Michael I. Bruce,Maryka Gaudio,Natasha N. Zaitseva,Brian W. Skelton,Allan H. White,Boris Le Guennic,Boris Le Guennic,Jean-François Halet,Mark A. Fox,Rachel L. Roberts,František Hartl,Paul J. Low +12 more
TL;DR: Spectro-electrochemical studies of the ruthenium aryl and arylene alkynyl complexes indicate that perfluorination of the aromatic ring compounds has little effect on the appreciable diet orbit and the electronic character of the compounds is reported.
Book ChapterDOI
Heteronuclear Magnetic Double Resonance
TL;DR: In this article, a theoretical comparison between the various methods of spin decoupling shows that even in the most favorable circumstances, the necessary r.f. field is nearly ten times greater, with unmodulated double resonance, than for either of the two modulated versions.
Journal ArticleDOI
Borane-Induced Dehydration of Silica and the Ensuing Water-Catalyzed Grafting of B(C6F5)3 To Give a Supported, Single-Site Lewis Acid, ≡SiOB(C6F5)2
Ying-Jen Wanglee,Jerry Hu,Rosemary E. White,Ming-Yung Lee,S. Michael Stewart,Philippe Perrotin,Susannah L. Scott +6 more
TL;DR: Although B(C(6)F(5))(3) has been reported to be unreactive toward silica in the absence of a Brønsted base, it is found that it can be grafted even at room temperature, albeit slowly.