Zobrazeno 1 - 10
of 39
pro vyhledávání: '"Hubert Figeys"'
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 73:199-213
– N.M.R. spectra of aldehydes, methylketones and esters of phenanthrene, substituted in positions 2, 3 and 9, have been recorded at 60 Mc. In the nine cases examined in this work, it is possible to determine the position of substitution, without am
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a678984d77017ea44d554fd04c999bab
https://doi.org/10.1002/bscb.19640730307
https://doi.org/10.1002/bscb.19640730307
Autor:
Hubert Figeys, B. Wilmet‐Devos
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 79:459-471
The frequencies of the 1La transitions of polycyclic aromatic aldehydes are related linearly to the energy gap between the highest bonding and the lowest anti-bonding orbitals in these molecules calculated by an iterative Huckel-L. C. A. O.-method. S
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5b0464bf06184f3c0d5619fe05dd17a8
https://doi.org/10.1002/bscb.19700790708
https://doi.org/10.1002/bscb.19700790708
Autor:
Hubert Figeys, Michel Gelbcke
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 83:369-379
The bromination of 1,5‐hexadiyne at ‐40° in chloroformic solution gives 1,2,5,6‐tetrabromo‐1,5‐hexadiene (5) with a yield of 948; at higher temperatures (e. g. ‐15°), bromination of the double bonds occurs. The stereochemistry of (5) ha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::98c6144bd8bbc2b37f34ed318c06a688
https://doi.org/10.1002/bscb.19740830908
https://doi.org/10.1002/bscb.19740830908
Autor:
Hubert Figeys, Michel Gelbcke
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 83:381-392
The electrodimerisation of acroleine on a zinc-copper couple in the presence of acetic acid gives 1,5-hexadiene-3,4-diol 5 in 76% yield, the ratio meso/dl being 60/40. Gas chromatographic analysis of the reaction mixture reveals the presence of threo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::577e3085411046236a64801d0c3efde0
https://doi.org/10.1002/bscb.19740830909
https://doi.org/10.1002/bscb.19740830909
Autor:
Hubert Figeys, Jacques Nasielski
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 75:601-619
The rate of formation of 2-naphtaldehyde semicarbazone in methanol solution is dependent on the pH and passes through a maximum. It is shown that in acidic media (pH < pHopt), the reaction undergoes specific and general acid catalysis, and that an im
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1e53d001d536b3cbc23102dd8580ddad
https://doi.org/10.1002/bscb.19660750905
https://doi.org/10.1002/bscb.19660750905
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 88:905-909
A number of 3,4-diazanorcaradienes has been prepared from s-tetrazines and cyclopropenes; their n. m. r. spectra (at various temperatures), mass spectra and, where apposite, ring-inversion and/or decomposition, have been noted.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4f8b565562be19ee72a2dbde8f847ba1
https://doi.org/10.1002/bscb.19790881111
https://doi.org/10.1002/bscb.19790881111
Publikováno v:
Weed Science. 40:371-377
Photoacoustic spectroscopy was used to study effects of atrazine and diuron on excised leaves of triazine-susceptible (S) and -resistant (R) biotypes of black nightshade. Changes of oxygen and photothermal components were compared to photochemical fl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a12272091e8c6c651e142fcdf4d02007
https://doi.org/10.1017/s0043174500051766
https://doi.org/10.1017/s0043174500051766
Autor:
Michel Neuwels, Hubert Figeys
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 91:445-445
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::76fdb3b32e436b99127bb26413f24789
https://doi.org/10.1002/bscb.198209105104
https://doi.org/10.1002/bscb.198209105104
Publikováno v:
Tetrahedron Letters. 21:2365-2368
The Thermally controlled addition of methylpropiolate or cyanoacetyle-ne to 1-methoxycarbonyl-or 1-cyano-quadricyclanone leads in a regiospecific way to the corresponding 1,5-disubstituted cyclooctatetraenes.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::72aab46ebd3b7c0e2ee721538d6757aa
https://doi.org/10.1016/s0040-4039(00)92608-x
https://doi.org/10.1016/s0040-4039(00)92608-x
Autor:
R. Jammar, Hubert Figeys
Publikováno v:
Tetrahedron Letters. 22:637-640
The first-order rate constants of the thermal rearrangement of several N-pyridino-2-vinyl-aziridines into the corresponding pyrido-azepines have been determined. Substituent effects on this isomerization were found to be completely analogous to the r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a0afea7ac07ba7e5813993a537aedfd2
https://doi.org/10.1016/s0040-4039(01)92510-9
https://doi.org/10.1016/s0040-4039(01)92510-9