作者:J. Valdés-Martı́nez、S. Hernández-Ortega、L.J. Ackerman、D.T. Li、J.K. Swearingen、D.X. West
DOI:10.1016/s0022-2860(99)00332-4
日期:2000.6
N-(2-pyridylethyl)-N'-phenylthiourea, triclinic, P-1, a = 8.616(1) Angstrom, b = 9.663(1) Angstrom, c = 9.761(1) Angstrom, alpha = 102.05(1)degrees, beta = 102.36(1)degrees, and gamma = 116.17(1)degrees, V = 668.5(1) Angstrom(3), Z = 2, mu = 2.022 mm(-1), N-(2-pyridylethyl)-N'-p-tolylthiourea, triclinic, P-1, a = 8.804(3) Angstrom, b = 9.951(2) Angstrom, c = 10.255(2) Angstrom, alpha = 115.03(2)degrees, beta = 105.93(2)degrees, gamma = 104.04(2) Angstrom, alpha = 713.43(1) Angstrom(3), Z = 2, mu = 2.173 mm(-1), N-(2-pyridyl-ethyl)-N'-p-bromophenylthiourea, triclinic, P-1, a = 9.536(1) Angstrom, b = 9.809(1) Angstrom, c = 10.042(2) Angstrom alpha = 115.88(1)degrees, beta = 96.80(1)degrees, and gamma = 110.44(1)degrees, V = 750.0(6) Angstrom(3), Z = 2, mu = 28.73 mm(-1), N-(2-pyridyl- ethyl)-N'-p-nitrophenylthiourea, triclinic, P-1, a=8.046(2) Angstrom, b=8.602(3) Angstrom, c=10.938(3) Angstrom, alpha=80.74(3)degrees, beta= 89.77(2)degrees, gamma = 77.00(3)degrees, V = 727.6(6) Angstrom(3), Z = 2, Cc = 2.325 mm(-1) and N-(2-pyridylethyl)-N'-p-methoxyphenylthiourea, monoclinic, P2(1)/n, a = 11.526(2) Angstrom, b = 9.723(2) Angstrom, c = 13.460(2) Angstrom, beta = 100.49(2)degrees, V = 1483.3(2) Angstrom(3), Z = 4, mu = 1.929 mm(-1). All five molecules possess an intramolecular hydrogen bond between NH and the pyridyl nitrogen, as well as intermolecular hydrogen bonding between N'H and a thione sulfur of a second molecule to form centrosymmetric dimers. Solution H-1 NMR studies (CDCl3) show the N'H resonance downfield for each thiourea and its shift, as well as that of NH, is affected by substituents on the phenyl ring. (C) 2000 Elsevier Science B.V. All rights reserved.