caa a22 4500 465807623 CHVBK 20180323112107.0 cr unu---uuuuu 170327e19900901xx s 000 0 eng 10.1007/BF00529982 doi (NATIONALLICENCE)springer-10.1007/BF00529982 Atropo-isomerism and abnormal temperature dependence of paramagnetic shifts in 1H NMR spectra of heterocyclic analogs of isoflavones in the presence of lanthanide chelates [Elektronische Daten] [A. Turov, I. Komarov, V. Khilya, M. Kornilov] It has been found that spatially hindered analogs of isoflavones can occur as a mixture of atropo-isomers, which is conveniently detected by using optically active lanthanide shift reagents. It is shown that on lowering the temperature the individual shifts of the signals of the isoflavone protons can either increase or decrease. The observed anomalies are attributed to changes in the predominant conformations of the molecules as the temperature is varied. Plenum Publishing Corporation, 1990 Turov A. Kiev University, USSR aut Komarov I. Kiev University, USSR aut Khilya V. Kiev University, USSR aut Kornilov M. Kiev University, USSR aut Theoretical and Experimental Chemistry Kluwer Academic Publishers-Plenum Publishers 25/5(1990-09-01), 580-583 0040-5760 25:5<580 1990 25 11237 https://doi.org/10.1007/BF00529982 text/html Onlinezugriff via DOI 1 brief-communication jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00529982 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Turov A. Kiev University, USSR aut NATIONALLICENCE 700 1- Komarov I. Kiev University, USSR aut NATIONALLICENCE 700 1- Khilya V. Kiev University, USSR aut NATIONALLICENCE 700 1- Kornilov M. Kiev University, USSR aut NATIONALLICENCE 773 0- Theoretical and Experimental Chemistry Kluwer Academic Publishers-Plenum Publishers 25/5(1990-09-01), 580-583 0040-5760 25:5<580 1990 25 11237 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer