Zobrazeno 1 - 8
of 8
pro vyhledávání: '"Ludger Meschede"'
Autor:
Hans-Heinrich Limbach, Ludger Meschede
Publikováno v:
The Journal of Physical Chemistry. 95:10267-10280
KA2 = exp[(-29 & 1 J mol-I K-')/R] expt(5.7 f 0.3 kJ mol-')/RT] L mol-l, 170 K < T < 254 K For the tautomerism in the cyclic dimer the following isotopic rate constants were obtained: kAIHH = 109,9'0.3 exp[(-18.9 f 0.3 kl mol-')/RT] S-'; kAIHD = 10'0
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8e515d2050ca1de305cc664076f4fedb
https://doi.org/10.1021/j100178a009
https://doi.org/10.1021/j100178a009
Autor:
Hans-Heinrich Limbach, Bruno Chaudret, José Elguero, John A. S. Smith, Jürgen Braun, Ch. Hoelger, Hans Benedict, Gerd Buntkowsky, Ludger Meschede, Gerd Scherer, Francisco Aguilar-Parrilla, Wolf Peter Fehlhammer, Bernd Wehrle
Publikováno v:
AIP Conference Proceedings.
In this paper recent developments and results of dynamic high resolution NMR spectroscopy in the study of elementary steps of proton transfers in liquids and solids are reviewed.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::644020c3e55acb98242c928b0210a58e
https://doi.org/10.1063/1.45383
https://doi.org/10.1063/1.45383
Autor:
Jürgen Braun, Helmut Rumpel, F. Aguilar-Parilla, Hans-Heinrich Limbach, Gerd Scherer, Ludger Meschede, C. Hoelger, Bernd Wehrle, Martin Schlabach
Publikováno v:
25th Congress Ampere on Magnetic Resonance and Related Phenomena ISBN: 9783540531364
Kinetic HH/HD/DD isotope and liquid/solid state effects on intra— and inter-molecular double proton transfer reactions of organic compounds have been studied using high resolution liquid and solid state NMR techniques. From these studies informatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::073f26b8493de0f7636ccf3b0cafd7ac
https://doi.org/10.1007/978-3-642-76072-3_61
https://doi.org/10.1007/978-3-642-76072-3_61
Publikováno v:
Zeitschrift für Naturforschung A. 44:459-472
Stratagems are presented for the determination of kinetic isotope effects of proton exchange reactions by dynamic NMR spectroscopy. In such experiments, lineshape analyses and/or polarization transfer experiments are performed on the exchanging proto
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aa92404bea2ffd0440c3fc0efd63fcf5
https://doi.org/10.1515/zna-1989-0516
https://doi.org/10.1515/zna-1989-0516
Publikováno v:
Berichte der Bunsengesellschaft für physikalische Chemie. 92:469-485
The 90 MHz 1H NMR spectra of 15N, 15N′-dipentadeuterophenylformamidine (DPFA), a nitrogen analogue of formic acid, dissolved in tetrahydrofuran-d8 (THF) have been measured as a function of concentration, deuterium fraction in the 1H-15N sites, and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ea6814372828cf8b1f31754b27af67d1
https://doi.org/10.1002/bbpc.198800112
https://doi.org/10.1002/bbpc.198800112
Autor:
Hans-Heinrich Limbach, Martin Schlabach, Helmut Rumpel, Gerd Scherer, Ludger Meschede, Bernd Wehrle
Publikováno v:
Journal of Molecular Structure. 177:143-155
Using high resolution dynamic NMR spectroscopy of liquids and solids we have detected a number of novel symmetrical intra- and intermolecular neutral double proton transfers between nitrogen atoms in 15 N enriched compounds such as porphines, porphyc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d861c3a66460fa29fd3c115783e0d7df
https://doi.org/10.1016/0022-2860(88)80084-x
https://doi.org/10.1016/0022-2860(88)80084-x
Publikováno v:
Berichte der Bunsengesellschaft für physikalische Chemie. 90:1122-1129
Using Dynamic NMR Spectroscopy we have detected a novel intramolecular double hydrogen transfer in the oxalamidine (OA) system. OA is, therefore, so far the smallest known molecular unit capable of such a transfer. Because of solubility problems, exp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6c23815786a22176419938f348351fc3
https://doi.org/10.1002/bbpc.19860901204
https://doi.org/10.1002/bbpc.19860901204
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