Muhammad Shafiq

In the title compound, C16H13Cl2N3O2S, the dihedral angle between the aromatic rings is 6.62 (2)° and the C=N-N=C torsion angle is 176.2 (4)°. The thia-zine ring shows an envelope conformation, with the S atom displaced by 0.633 (6) Å from the mean plane of the other five atoms (r.m.s. deviation = 0.037 Å). The Cl atom is an an axial conformation and is displaced by 2.015 (6) Å from the thia-zine ring plane. In the crystal, mol-ecules are linked by C-H⋯O inter-actions, generating a three-dimensional network. Very weak aromatic π-π stacking inter-actions [centroid-centroid separations = 3.928 (2) Å] are also observed.

In the title compound, C₁₉H₂₁N₃O₂S, the dihedral angle between the aromatic rings is 6.7 (2)° and the C=N—N=C torsion angle is 178.0 (2)°. The conformation of the thiazine ring is an envelope, with the S atom displaced by 0.802 (2) Å from the mean plane of the other five atoms (r.m.s. deviation = 0.022 Å). In the crystal, molecules are linked by C—H...O interactions, generatingC(5) chains propagating in [010]. A weak C—H...π interaction is also observed.

In the title compound, C₁₈H₁₆ClN₃O₂S, the dihedral angle between the aromatic rings is 4.81 (2)° and the alkyl chain takes on an extended conformation [N—C—C—C = 179.2 (4)°]. The conformation of the thiazine ring is an envelope, with the S atom displaced by −0.805 (3) Å from the mean plane of the other five atoms (r.m.s. deviation = 0.046 Å). The Cl atom is an axial conformation and is displaced by 1.761 (4) Å from the thiazine ring plane. In the crystal, inversion dimers linked by pairs of C—H...O interactions generateR₂²(20) loops and further C—H...O hydrogen bonds link the dimers into (001) sheets. Weak aromatic π–π stacking interactions [centroid–centroid separations = 3.870 (3) and 3.883 (3) Å] are also observed.

In the title compound, C₁₇H₁₆BrN₃O₂S, the dihedral angle between the aromatic rings is 1.24 (15)° and the C=N—N=C torsion angle is 167.7 (3)°. The conformation of the thiazine ring is an envelope, with the S atom displaced by 0.805 (3) Å from the mean plane of the other five atoms (r.m.s. deviation = 0.027 Å). In the crystal, C—H...O interactions link the molecules intoC(10) [010] chains. A weak C—H...π interaction is also observed.

The mol-ecule of the title compound, C11H13ClN2O3, is planar (r.m.s. deviation = 0.0587 Å for non-H atoms) and adopts a Z conformation about the C=N double bond. In the crystal, mol-ecules are linked via an N-H⋯O hydrogen bond, forming zigzag chains propagating along [010]. These chains are consolidated by C-H⋯O hydrogen bonds.

In the title compound, [Fe(C5H5)(C8H11N4S)], the cyclo-penta-dienyl (Cp) rings of the ferrocene unit are close to being eclipsed. They are inclined to one another at an angle of 1.95 (2)° and lie 3.309 (2)Å away from each other. The ethyl-idene-thio-carbonohydrazide fragment is planar, with an r.m.s. deviation of 0.0347 (2) Å from the mean plane of its eight non-H atoms, and makes dihedral angles of 21.78 (1) and 19.97 (1)° with respect to the two Cp rings. The mol-ecule adopts a trans geometry about the C=N double bond. In the crystal, N-H⋯(N/S) and C-H⋯S inter-actions stack the mol-ecules in an inverse fashion along the b axis.

In the title compound, C(15)H(13)N(3)O(2), the dihedral angle between the benzotriazole ring system (r.m.s. deviation = 0.0124 Å) and the benzene ring is 76.21 (3)°. The meth-oxy C atom deviates from its benzene ring plane by 0.063 (2)Å. In the crystal, inversion dimers linked by pairs of C-H⋯O hydrogen bonds generate R(2) (2)(12) loops.

In the title compound C(8)H(6)BrN(3)O, the benzotriazole ring is essentially planar (r.m.s. deviation = 0.0034 Å) and the bromo-acetyl unit is twisted at a dihedral angle of 15.24 (16)° with respect to it. In the crystal, pairs of C-H⋯O hydrogen bondings result in the formation of inversion dimers, forming R(2) (2)(12) rings, which are connected by further C-H⋯O inter-actions into chains extending along the b-axis direction.

In the title compound, C(17)H(17)N(3)O(2)S, the dihedral angle between the aromatic rings is 6.3 (5)° and the C=N-N=C group is statistically planar [torsion angle = 179.8 (8)°]. The conformation of the thia-zine ring is an envelope, with the S atom displaced by 0.823 (9) Å from the mean plane of the other five atoms (r.m.s. deviation = 0.012 Å). In the crystal, C-H⋯O inter-actions link the mol-ecules into C(5) chains propagating along [101]. The chains are consolidated by weak aromatic π-π stacking between the benzene and toluene rings [centroid-to-centroid separation = 3.826 (5) Å and inter-planar angle = 6.3 (4)°].