Structural, spectral and thermal studies of substituted N-(2-pyridyl)-N′-phenylthioureas
作者:Jesús Valdés-Martı́nez、Simón Hernández-Ortega、Georgina Espinosa-Pérez、Carmina A Presto、Anne K Hermetet、Kristin D Haslow、Lily J Ackerman、Lisa F Szczepura、Karen I Goldberg、Werner Kaminsky、Douglas X West
DOI:10.1016/s0022-2860(01)00934-6
日期:2002.8
N-2-(3-picolyl)-N'-phenylthiourea, 3PicTuPh, monoclinic, P2(1)/n, a = 7.617(2) b = 7.197(5), c = 22.889(5) Angstrom, beta = 94.63(4)degrees, V = 1250.7(1) Angstrom(3) and Z = 4; N-2-(4-picolyl)-N'-phenylthiourea, 4PicTuPh, triclinic, P-1, a = 7.3960(5), b = 7.9660(12), c = 21.600(3) Angstrom, alpha = 86.401(4), beta = 84.899(8), gamma = 77.769(8)degrees, V = 1237.5(3) Angstrom(3) and Z = 4; N-2-(5-picolyl)N'-phenylthiourea, 5PicTuPh, monoclinic, P2(1)/c, a = 14.201(1), b = 4.905(3), c = 17.689(3) Angstrom, beta = 91.38(1)degrees, V = 1231.8(7) Angstrom(3) and Z = 4; N-2-(6-picolyl)-N'-phenylthiourea, 6PicTuPh, monoclinic, C2/c2, a = 14.713(1), b = 9.367(1), c = 18.227(1) Angstrom, beta = 92.88(1)degrees, V = 2515.5(1) Angstrom(3) and Z = 8 and N-2-(4,6-lutidyl)-N'-phenylthiourea, 4,6LutTuPh, monoclinic, C2/c, a = 11.107(2), b = 11.793(2), c = 20.084(4) Angstrom, beta = 96.10(3)degrees, V = 2616(1) Angstrom(3) and Z = 8. Intramolecular hydrogen bonding between (NH)-H-1 and the pyridyl nitrogen and intermolecular hydrogen bonding involving the thione sulfur are affected by substitution of the pyridine ring, as is the planarity of the molecule. H-1 NMR studies in CDCl3 show the NH' hydrogen resonance considerably downfield from other resonances in the spectrum for each thiourea. (C) 2002 Elsevier Science B.V. All rights reserved.