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| 11. |
EPR study of Bi‐, Ter‐ and quaterthiophene radical cations |
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Magnetic Resonance in Chemistry,
Volume 33,
Issue 1,
1995,
Page 70-76
Burkhard Kirste,
Peizhu Tian,
Gerhard Kossmehl,
Gunnar Engelmann,
Werner Jugelt,
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摘要:
AbstractRadical cations of a series of α‐methyl‐substituted bi‐, ter‐ and quaterthiophenes were investigated by EPR and, in part, ENDOR spectroscopy. In the case of terthiophenes, the electronic and steric effects of methyl substituents were studied. The experimentally determined spin density distributions were rationalized by means of semi‐empirical quantum‐mechanical calculations (MNDO, PM3, RHF‐INDO/SP). Sterically non‐hindered oligothiophene radical cations are planar and form mixtures ofcisandtransconformers, whereas uniform species were observed in the case of sterically hindered, non‐plan
ISSN:0749-1581
DOI:10.1002/mrc.1260330112
出版商:John Wiley&Sons, Ltd.
年代:1995
数据来源: WILEY
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| 12. |
Solid‐state mercury‐199 NMR of hexakis (dimethyl sulphoxidé) mercury (II) trifluoromethanesulphonate: A new standard for mercury‐199 CP/MAS experiments |
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Magnetic Resonance in Chemistry,
Volume 33,
Issue 1,
1995,
Page 77-79
James M. Hook,
Philip A. W. Dean,
Leon C. M. van Gorkom,
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摘要:
AbstractHexakis(dimethyl sulphoxide)mercury(II) trifluoromethanesulphonate, [Hg(dmso)6](O3SCF3)2, is a stable, readily synthesized compound which is an excellent standard for setting up CP/MAS experiments in solid‐state199Hg NMR. The isotropic chemical shift, δISO‐2313 ppm, is to lower frequency than that measured for the same material in solution. The static spectrum exhibits of powder pattern indicative of axial symmetry about the mercury atom, with a chemical shift anisotropy of 122
ISSN:0749-1581
DOI:10.1002/mrc.1260330113
出版商:John Wiley&Sons, Ltd.
年代:1995
数据来源: WILEY
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| 13. |
J. A. Weil, J. R. Bolton J. E. Wertz. Electron paramagnetic resonance: Elementary theory and applications. Wiley‐interscience, New York (1994). xxi 568 pages, £66.00/$91.95. ISBN 0‐471‐57234‐9 |
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Magnetic Resonance in Chemistry,
Volume 33,
Issue 1,
1995,
Page 80-80
Fabian Gerson,
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ISSN:0749-1581
DOI:10.1002/mrc.1260330114
出版商:John Wiley&Sons, Ltd.
年代:1995
数据来源: WILEY
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| 14. |
Announcements |
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Magnetic Resonance in Chemistry,
Volume 33,
Issue 1,
1995,
Page 81-82
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ISSN:0749-1581
DOI:10.1002/mrc.1260330115
出版商:John Wiley&Sons, Ltd.
年代:1995
数据来源: WILEY
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| 15. |
Masthead |
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Magnetic Resonance in Chemistry,
Volume 33,
Issue 1,
1995,
Page -
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PDF (98KB)
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ISSN:0749-1581
DOI:10.1002/mrc.1260330101
出版商:John Wiley&Sons, Ltd.
年代:1995
数据来源: WILEY
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