Structural, thermal and spectral studies of N-2-pyridyl-, N-2-picolyl- and N-2-(4,6-lutidyl)-N′-(3-methoxyphenyl)thioureas

Add time:07/28/2019    Source:sciencedirect.com

N-2-pyridyl-N′-3-methoxyphenylthiourea, PyTu3OMe, triclinic, P-l, a=8.6590(16), b=8.7489(16), c=10.0540(15)Å, α=90.255(9), β=66.765(8), γ=68.547(7)°, V=641.40(19)Å3 and Z=2; N-2-(3-picolyl)-N′-3-methoxyphenylthiourea, 3PicTu3OMe, triclinic, P-1, a=6.9100(9), b=12.7370(16), c=16.4710(14)Å, α=107.782(6), β=91.656(7), γ=95.115(4)°, V=1372.5(3)Å3 and Z=4; N-2-(4-picolyl)-N′-3-methoxphenylthiourea, 4PicTu3OMe, monoclinic, C2/c, a=12.5036(7), b=8.5942(5), c=25.4050(10)Å, β=97.712(3)°, V=2705.3(2)Å3 and Z=8; N-2-(5-picolyl)-N′-3-methoxyphenylthiourea, 5PicTu3OMe, monoclinic, P21/c, a=10.9200(4), b=15.3920(15), c=8.1150(11)Å, β=92.020(5)°, V=1363.1(2)Å3 and Z=4; N-2-(6-picolyl)-N′-3-methoxyphenylthiourea, 6PicTu4OMe, triclinic, P-1, a=7.4220(16), b=9.944(3), c=10.038(3)Å, α=104.815(9), β=94.452(16), γ=108.134(14)°, V=670.6(3)Å3 and Z=2 and N-2-(4,6-lutidyl)-N′-3-methoxyphenylthiourea, 4,6LutTu3OMe, orthorhombic, Pbca, a=16.3710(5), b=7.4910(6), c=24.1890(15)Å, V=2966.4(3), Z=8. Intramolecular hydrogen bonding between N′H and the pyridine nitrogen and intermolecular hydrogen bonding between NH and the thione sulfur are characteristic of these thioureas except that 3PicTu3OMe has a very weak intermolecular NH⋯S interaction due to a steric effect of the methyl group.

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