Preparation of (R)-(-)-6,6'-Bis(3,5-dinitrobenzamido)biphenyl-2,2'-dicarboxylic Acid, a Potential Chiral HPLC Selector
作者:Miloš Tichý、Jiří Závada
DOI:10.1135/cccc19952161
日期:——
The title optically active diacid I has been prepared as a potential selector for chiral stationary phase in the HPLC separation of enantiomers.
具有光学活性的二元酸已被制备为HPLC对映体分离中的手性固定相的潜在选择器。
Organic electroluminescent device
申请人:Merck Patent GmbH
公开号:US09337430B2
公开(公告)日:2016-05-10
The present invention relates to electronic devices, in particular organic electroluminescent devices, comprising compounds of the formula (1), to the corresponding compounds, and to a process for the preparation of these compounds.
The present invention relates to electronic devices, in particular organic electroluminescent devices, comprising compounds of the formula (1), to the corresponding compounds, and to a process for the preparation of these compounds.
Kenner; Stubbings, Journal of the Chemical Society, 1921, vol. 119, p. 599
作者:Kenner、Stubbings
DOI:——
日期:——
Lanthanide induced shifts as a conformational probe foro,o,o′,o′-tetrasubstituted diphenyls
作者:E. Díaz、A. Guzmán、M. Cruz、J. Mares、D. J. Ramírez、P. Joseph-Nathan
DOI:10.1002/mrc.1270130306
日期:1980.3
AbstractThe 1H NMR spectra of several symmetrical diphenyls, having two unlike substituents on the ortho positions of each aromatic ring, were determined in the presence of Eu(fod)3 and of Pr(fod)3. The lanthanide induced shifts were used to establish the more probable conformation of the molecules, as deduced from computer calculations assuming pseudocontact interactions. It was found that the two like groups are in opposite conformation and that the inter‐ring angles are in the order of 15–35°.