Annual Reports on NMR Spectroscopy, Vol. 23 - download pdf or read online

By G. A. Webb

ISBN-10: 0125053231

ISBN-13: 9780125053235

This ebook is a part of a chain on spectroscopy, and covers NMR experiences of remoted spin-pairs within the reliable country, the oxidation nation dependence of transition steel shieldings, the Cinderella nuclei, nuclear spin rest in natural structures, suggestions of macromolecules and aggregates and the NMR of coals and coal items. similar titlesare volumes 20, 21 and 22 within the sequence. summary: This ebook is a part of a sequence on spectroscopy, and covers NMR reviews of remoted spin-pairs within the good kingdom, the oxidation country dependence of transition steel shieldings, the Cinderella nuclei, nuclear spin rest in natural platforms, options of macromolecules and aggregates and the NMR of coals and coal items. comparable titlesare volumes 20, 21 and 22 within the sequence

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Extra resources for Annual Reports on NMR Spectroscopy, Vol. 23

Example text

Fig. 16. Experimental I3C nutation NMR spectra of [13CH3' 3C(CH,),] and [CH,C('3CH,),]+, with overlaying simulations corresponding to the various 13C-13C distances indicated. (Reproduced with permission from Yannoni et ~ 1 . 4. Selective detection of 13C-13C connectivities One of the primary goals of solid-state NMR has been to obtain precise structural information from the spectra of, if possible, natural abundance samples. The increase in sensitivity achieved by applying cross-polarization between 'H nuclei and rare spins26 has satisfied this to some extent.

E. 02 A) in one of the monophosphazenes, N-(tripheny1)phosphoranylideneaniline(Ph,P=NPh), was determined before diffraction values for this compound were a~ailable;'~' when this information was reported, the two values were found to be in excellent agreement. The orientation of the 31Pchemical shielding tensor in this P(V) compound, with the most shielded component directed along the P=N bond, was in marked contrast to that observed for the P(II1) compound, dipho~phene,'~ where the most shielded component lies perpendicular to the molecular plane.

P. E. 02 A) in one of the monophosphazenes, N-(tripheny1)phosphoranylideneaniline(Ph,P=NPh), was determined before diffraction values for this compound were a~ailable;'~' when this information was reported, the two values were found to be in excellent agreement. The orientation of the 31Pchemical shielding tensor in this P(V) compound, with the most shielded component directed along the P=N bond, was in marked contrast to that observed for the P(II1) compound, dipho~phene,'~ where the most shielded component lies perpendicular to the molecular plane.

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Annual Reports on NMR Spectroscopy, Vol. 23 by G. A. Webb


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