Magnetic Resonance in Chemistry p. 591 - 596 (1985)
Update date:2022-09-26
Topics:
Sudha, L. V.
Manogaran, S.
Sathyanarayana, D. N.
Several N,N'-dipyridyl- and N-phenyl-N'-pyridyl-thioureas were examined in different solvents at various temperatures by 1H NMR in order to study their conformational properties.The influence of concentration and the methyl substituent in the pyridine ring on the chemical shifts of the NH and pyridine groups was investigated.The observed chemical shifts are analysed in terms of the conformational properties of the molecules.Free energy barriers to the internal rotation about the C-N bonds have been determined.Infrared spectra have been measured to supplement the NMR studies.Intramolecular hydrogen bonding played a major role in the preferred conformation of pyridylthioureas.The data further revealed an interesting dynamic exchange phenomenon occuring in symmetric N,N'-dipyridylthioureas between two intramolecularly hydrogen bonded conformers.
View MoreNingxia Soochow Agrochemical Limited Company
Contact:(+86)0512 6320 8190
Address:wujiang
Jiangsu Dacheng Pharmaceutical and Chemical Co.,Ltd
Contact:+86-0517-87036900
Address:Chuzhou Chemical park, Huai'an, Jiangsu Province
Contact:+86-511-88790000
Address:338 North Yushan Rd, Zhenjiang, Jiangsu 212016
Jiangsu Zenji Pharmaceuticals LTD
Contact:+86-025-83172562; +1-224-888-1133(USA)
Address:No.5 Xinmofan Road
SuZhou Ascepion Pharmaceuticals, Inc.(expird)
Contact:0512-86881668
Address:Building C,68Xingqing Road,Suzhou,China.
Doi:10.1021/ol034582b
(2003)Doi:10.1107/S0567740874007102
(1974)Doi:10.3390/molecules22081277
(2017)Doi:10.1007/BF00471352
()Doi:10.1002/anie.200390164
(2003)Doi:10.1021/jo00896a021
(1975)