Zobrazeno 1 - 10
of 37
pro vyhledávání: '"J.M. Pechine"'
Publikováno v:
Journal of Fluorine Chemistry. 86:149-153
The use of trifluoroacetic anhydride as an achiral derivatizing agent for enantiomeric excess measurement through chiral liquid crystal NMR is described. Examples involving amines, amino acids and alcohols are provided. It is shown that the proton de
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1abfbb1e070cba531c902e30fd633d81
https://doi.org/10.1016/s0022-1139(97)00101-2
https://doi.org/10.1016/s0022-1139(97)00101-2
Publikováno v:
Tetrahedron: Asymmetry. 8:485-494
The application of a ‘deuterium probe’ for the enantiomeric analysis of chiral amines, aminoacids and alcohols is proposed. The probe is the perdeuterated benzoyl fragment which can easily and reversibly be attached to the corresponding materials
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1ddffe32ccc3e50e5871c83ef15b9766
https://doi.org/10.1016/s0957-4166(96)00533-2
https://doi.org/10.1016/s0957-4166(96)00533-2
Publikováno v:
Chem. Commun.. :1734-1735
Deuterium NMR in an aqueous non-chiral liquid crystal allows the discrimination of enantiomers through their ordering inside beta-cyclodextrins.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8f1cba21c263f97b261212a31fbe7fba
https://doi.org/10.1039/b205256c
https://doi.org/10.1039/b205256c
Publikováno v:
International Journal of Mass Spectrometry and Ion Physics. 25:7-25
The ionization and fragmentation of dimethyl and diethyl ether have been studied by means of photoionization at room temperature and low temperature. The parent ion thresholds show evidence of hot band effects, and the adiabatic ionization potentials
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fd81ed017c2484fa52275f50c9602330
https://doi.org/10.1016/0020-7381(77)80100-9
https://doi.org/10.1016/0020-7381(77)80100-9
Publikováno v:
Tetrahedron. 38:1413-1416
Thermolysis at 800° of a series of β-keto-trimethylsilyl-enol-ethers allows the elimination of a trimethylsilanol molecule through a 1,5 rearrangement. The reaction products are furanic derivatives, which are obtained in often good yields through a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::036e69aab1cfdabdc0fa665841a27eb0
https://doi.org/10.1016/0040-4020(82)80222-6
https://doi.org/10.1016/0040-4020(82)80222-6
Publikováno v:
Journal of Electron Spectroscopy and Related Phenomena. 7:247-256
The photoelectron spectra of 6 dibromoalkanes and 9 bromofluoroalkanes have been recorded in the region of 10 to 11 eV, corresponding to the ionization of the n electrons of the bromine atom. For most of the compounds four peaks are observed. In the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b14e515136a7a6c8175feded25bc7b13
https://doi.org/10.1016/0368-2048(75)80064-8
https://doi.org/10.1016/0368-2048(75)80064-8
Publikováno v:
International Journal of Mass Spectrometry and Ion Physics. 12:188-192
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d164a2bc73cd6922b61420327cdd4e7b
https://doi.org/10.1016/0020-7381(73)80100-7
https://doi.org/10.1016/0020-7381(73)80100-7
Autor:
J.M. Pechine
Publikováno v:
Organic Mass Spectrometry. 6:805-814
Les spectres de masse de 2,3-diphenylbutanes erythro et threo sont attribues a un rearrangement et a une rupture simple; leur calcul est propose. II est suggere que les differences entre les spectres des deux isomeres proviennent essentiellement de a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a312af7031b40265eef4e4529ab07002
https://doi.org/10.1002/oms.1210060711
https://doi.org/10.1002/oms.1210060711
Publikováno v:
Organic Mass Spectrometry. 7:1287-1302
Les spectres de dix couples de bromures de cyclopentyle et de cyclohexyle α-substitues cis et trans sont enregistres pour onze energies d'ionisation distinctes comprises entre 10 et 20 eV. Pour chaque isomere un calcul du spectre de masse et de ses
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::126e9ccec047a272b13250fa3538177a
https://doi.org/10.1002/oms.1210071109
https://doi.org/10.1002/oms.1210071109
Publikováno v:
Journal of Electron Spectroscopy and Related Phenomena. 13:141-143
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::19ed191877db1451c3ae42f0d40a7d79
https://doi.org/10.1016/0368-2048(78)85019-1
https://doi.org/10.1016/0368-2048(78)85019-1