Zobrazeno 1 - 10
of 99
pro vyhledávání: '"Raphy Poupko"'
Autor:
Noga Friedman, Xiaolin Cao, Zeev Luz, Hailin Zheng, Herbert Zimmermann, Ellen J. Wachtel, Raphy Poupko, Teresa B. Freedman, Laurence A. Nafie
Publikováno v:
The Journal of Physical Chemistry A
The paper concerns the structural and optical isomers of nonamethoxy-tribenzocyclononene (compound 1). In the first part of the paper it is shown that 1 exists in two structural isomers: a rigid crown (c-1) with C3 symmetry and a flexible saddle (s-1
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f31d498bd129760f8a1741e9b1088f33
https://doi.org/10.1021/jp073329g
https://doi.org/10.1021/jp073329g
Publikováno v:
The Journal of Physical Chemistry B
Cyclotriveratrylene (CTV), or hexamethoxy tribenzocyclononatriene (hexamethoxy-TBCN) and other peripherally hexa-(or tri-)substituted TBCN were so far only known to exist in their crown form. Attempts to detect the corresponding saddle isomers failed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8d88dad46966e18b79cafcf9b7b4d913
https://doi.org/10.1021/jp040482r
https://doi.org/10.1021/jp040482r
Publikováno v:
Molecular Crystals and Liquid Crystals
A new homologous series of compounds, nonaalkanoyloxy tribenzocyclononene (TBCN-n, where n is the number of carbons per side chain) with n = 2 to 14 was synthesized. The compounds exist in two isomeric forms, crown and saddle. For sufficiently long s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::74fd081649902434c2b6bfee61534620
https://doi.org/10.1080/714965602
https://doi.org/10.1080/714965602
Publikováno v:
Journal of the American Chemical Society
Nona-alkanoyloxy tribenzocyclononene (CTV-n, where n is the number of carbons in the side chains) were prepared for n = 2 to 14. The homologues of this series appear in two stable isomeric forms, rigid crown and flexible saddle. We report on their is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e27fe890c5a3ec0079808046fad14427
https://doi.org/10.1021/ja020889e
https://doi.org/10.1021/ja020889e
Publikováno v:
The Journal of Chemical Physics. 115:8049-8059
The title compound, 1,2-dichloro-3,4,5,6-tetramethylbenzene (DCTMB) exhibits three solid phases, III, II, and I, of which two, Phase III (
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bc43c22bbf57d1b27c7777bc7abae8eb
https://doi.org/10.1063/1.1407840
https://doi.org/10.1063/1.1407840
Autor:
Heike Schmitt, Detlef Reichert, Herbert Zimmermann, Thomas Bräuniger, Raphy Poupko, Ulrich Haeberlen, Zeev Luz
Publikováno v:
Physical Chemistry Chemical Physics
Deuterium NMR measurements on powder and single crystal samples of 1,2,3-trichloro-4,5,6-trimethylbenzene (TCTMB) specifically deuterated at the central methyl group (TCTMB-d3) are reported. The compound exhibits three solid phases: (I) A high temper
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9e4a977efbb349731474b3b435f4c016
https://doi.org/10.1039/b008999k
https://doi.org/10.1039/b008999k
Publikováno v:
Journal of the American Chemical Society
Phosphorus-31 NMR measurements are reported on solid Li3P7(monoglyme)3 in the temperature range −90 to +70 °C, under both, nonspinning and magic angle spinning (MAS) conditions. At low temperatures (
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d7cc088ac8e6532823c181bb927328f5
https://doi.org/10.1021/ja992452l
https://doi.org/10.1021/ja992452l
Publikováno v:
Solid State Nuclear Magnetic Resonance. 13:137-148
One- (1-D) and two-dimensional (2-D) carbon-13 NMR exchange measurements in powder samples of isotopically normal durene under magic angle spinning (MAS) are reported. The experiments include rotor synchronized 2-D exchange (RS2DE), 1-D magnetization
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4b118394aeeec546cee94055fd8d2896
https://doi.org/10.1016/s0926-2040(98)00085-x
https://doi.org/10.1016/s0926-2040(98)00085-x
Publikováno v:
Liquid Crystals
The preparation and mesomorphic properties of four members of the homologous series of dimers, alkandioic acid bis\[pentakis(n -heptanoyloxy)phenyl] esters \[(C6 H13 COO)5 C6 OC(O)(CH2)(n-2)/2]2 with n= 6, 8, 12 and 14, are reported. They are hencefo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ac91461f93d479dfda4f0f3ee98718e7
https://doi.org/10.1080/026782997207966
https://doi.org/10.1080/026782997207966
Publikováno v:
The Journal of Physical Chemistry A. 101:5097-5102
Carbon-13 NMR is used to study the tautomeric equilibrium of citrinin in the solid state. The results confirm earlier X-ray diffraction studies, which indicated that the compound crystallizes in a disordered structure, with the p-quinone and o-quinon
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7e577fa6240695030ed6bd77ba609f90
https://doi.org/10.1021/jp970681t
https://doi.org/10.1021/jp970681t