Zobrazeno 1 - 10
of 23
pro vyhledávání: '"Hannah Weiler-Feilchenfeld"'
Publikováno v:
International Journal of Quantum Chemistry. 3:103-111
Measurements of the dipole moments and the electronic spectra of suitably substituted derivatives of xanthine and purine confirm the predictions, obtained by various methods of calculation, that the tautomeric forms of these two bases [N(7)H and N(9)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c7ae0ae981ebb7080e2297b00f8a4ffc
https://doi.org/10.1002/qua.560030715
https://doi.org/10.1002/qua.560030715
Autor:
Hannah Weiler-Feilchenfeld
Publikováno v:
Acyl Halides (1972)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::faf8d85953d2f56673e9a96b3794f055
https://doi.org/10.1002/9780470771273.ch3
https://doi.org/10.1002/9780470771273.ch3
Publikováno v:
Theoretica Chimica Acta. 46:79-88
The magnetic circular dichroism spectra of 9-methyl-8-azapurine and of 7-, 8-, and 9-methyl-8-azaadenine have been found to be well resolved; as many as four distinct electronic bands are observable in the 200–350 nm spectral region. CNDO calculati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a466751174ccea9dc79e5cca12ff59c5
https://doi.org/10.1007/bf00548084
https://doi.org/10.1007/bf00548084
Publikováno v:
Theoretica Chimica Acta. 36:135-143
CNDO calculations of the MCD spectra of 7- and 9-methyladenine have been carried out in two approximations. A minor modification of the CNDO/S method of Jaffe and coworkers shows an improvement over Jaffe's parameterization with respect to band separ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f6d91916afe41f56a4a642b966537e28
https://doi.org/10.1007/bf00554345
https://doi.org/10.1007/bf00554345
Autor:
H. Berthod, Felix Bergmann, Z. Neiman, Hannah Weiler-Feilchenfeld, B. Pullman, Ernst D. Bergmann
Publikováno v:
Tetrahedron. 26:1483-1491
The electronic properties of the four tautomers of purine have been studied theoretically by the PPP-DPB and by the CNDO/2 methods. The dipole moments and UV absorption spectra of simple derivatives of the different purine forms have been determined
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::87176ed5c75abf5499f39118f8f0c21f
https://doi.org/10.1016/s0040-4020(01)92977-1
https://doi.org/10.1016/s0040-4020(01)92977-1
Publikováno v:
Israel Journal of Chemistry. 10:753-763
A study of the dipole moments of xanthone, thioxanthone and their halogeno-derivatives leads to the conclusion that these molecules are not planar. In the xanthene and thioxanthene series, the dipole moments as well as the NMR spectra can be explaine
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7a6cccdf98ef2fc3b2e95ebad61d6e73
https://doi.org/10.1002/ijch.197200076
https://doi.org/10.1002/ijch.197200076
Publikováno v:
Israel Journal of Chemistry. 7:555-558
The electric dipole moment and the NMR, infrared and electronic spectra of 2-(ferrocenylmethylene)-1, 3-indandione (I) indicate that a dipolar structure (such as II or III) contributes significantly to the ground state of the molecule.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::05d8dfae24feae12204c4fd4773b026b
https://doi.org/10.1002/ijch.196900072
https://doi.org/10.1002/ijch.196900072
Publikováno v:
Israel Journal of Chemistry. 7:99-107
The molar refractions (polarizabilities) and dipole moments of fourteen 2-arylmethylene-1,3-indandiones (I) and the electronic absorption spectra of twenty-one representatives of this series have been measured. From these data certain features of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ee80390573f343ac511322025ace3eb7
https://doi.org/10.1002/ijch.196900014
https://doi.org/10.1002/ijch.196900014
Publikováno v:
Israel Journal of Chemistry. 9:111-118
Several halogen derivatives of isoquinoline were prepared and their electric dipole moments determined. The dipole moment of isoquinoline forms an angle of approximately 110° with the bond common to both rings of the molecule.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b499758a18f5390bf52da5983bce3bd7
https://doi.org/10.1002/ijch.197100019
https://doi.org/10.1002/ijch.197100019
Publikováno v:
Israel Journal of Chemistry. 6:823-826
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e2ae9a552f962ca94782665d5b9b2987
https://doi.org/10.1002/ijch.196800101
https://doi.org/10.1002/ijch.196800101