The NMR spectra of m -disubstituted benzenes, in which one of the substituents is kept constant and the other varied have been analysed. It has been shown that the proton-proton interactions in these molecules are not influenced by the inductive and resonance effects of the substituent but ...
N.M.R. spectra of ortho dibromo, dichloro and dicyano benzenes have been studied in liquid crystalline nematic phases. The spectra have been analysed iteratively. The direct couplings are found to be of opposite sign compared to the indirect ones. Ratios of the various inter-proton distances ...
spectra of symmetrical o -disubstituted benzene rings are explained on general grounds. Contrary to earlier proposals, the observation of this effect in unsymmetrical systems is not a suitable basis for corresponding 13 C n.m.r. assignments unless the proton spectrum has been sufficiently analyzed. ...
Stereoselective Synthesis of 1,2-Disubstituted β-Amino Alcohols by Nucleophilic Addition to N-tert-Butanesulfinyl -Alkoxyaldimines.amino alcohols (benzene compounds)amino alcohols (acyclic compounds)diastereoselective syntheses, enantioselective syntheses (incl. cis/trans-isomerism)...
Inverse electron demand Diels-Alder reactions of 3-carbomethoxy-2-pyrones. Controlled introduction of oxygenated aromatics: benzene, phenol, catechol, reso... Dale,L.,Boger,... - 《Journal of Organic Chemistry》 被引量: 385发表: 1984年 New chiral didehydroamino acid derivatives from a cyclic ...
Green, J.H.S.: Vibrational spectra of benzene derivates-VI: p -disubstituted compounds. Spectrochim. Acta 26A (7), 1503–1513 (1970)Green, J.H.S.: Vibrational spectra of benzene derivates-IX: o -disubstituted compounds. Spectrochim. Acta 26A (9), 1913–1923 (1970)...
The N.M.R. spectra of meta dichloro and meta dibromo benzenes are analysed in the nematic phase of 4-methoxy benzylidene-4-amino-α-methyl cinnamic acid-n-propyl ester at room temperature.doi:10.1080/00268976800101531Diehl, P.Khetrapal, C.L....
A theory of molecules in molecules - V. Study of the relative stability of some para-, meta-, and ortho-disubstituted benzene moleculesTransferability of localized orbitalsWave functions from fragment wave functionsC6H4XY, para-, meta-, and ortho-forms of ∼...
Effects of fixed substituents upon substituent chemical shifts of the C-1 atom in m- and p-disubstituted benzenes. Correlation with inductive substituent parameterChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. ...
Effect of substituents on the 1H n.m.r. spectra of para-disubstituted benzenes. A graphical aid in the correct assignment of chemical shiftsdoi:10.1002/mrc.1270090810Miroslav HolíkResearch Institute of Pure Chemicals, Lachema, 621 33 Brno, ČSSR...