The title compound, C(20)H(32)N(2)O(2)S, the condensation product of a thio-acetohydrazine and acetone, has a two-coordinate S atom and the angle at this atom is 100.7 (1)°. The (CH(3))C=N-NH-C(O)- substituent engages in N-H⋯O hydrogen-bonding inter-actions with the substituent of an adjacent mol-ecule across a center of inversion, generating a dimeric structure.
The title compound, C(25)H(34)N(2)O(3)S, is a derivative of N'-benzyl-ideneacetohydrazide having substituents on the acetyl and benzylidenyl parts, and displays a planar C(carbon-yl)-NH-NC(anis-yl) fragment [torsion angle = 174.9 (3)°]. The -NH- unit forms an N-H⋯O hydrogen bond with the carbonyl O atom of an inversion-related mol-ecule.
The complete mol-ecule of the title compound, C(26)H(20)N(2), is generated by crystallographic inversion symmetry. The terminal phenyl ring is twisted by 19.2 (1)° with respect to the adjacent phenyl-ene ring.
In the approximately planar title mol-ecule, C(14)H(10)BrClN(3)O(2), the dihedral angle between the aromatic ring planes is 5.79 (12)°. The conformation is stabilized by intra-molecular O-H⋯N and N-H⋯O hydrogen bonds and an inter-molecular O-H⋯O link leads to chains in the crystal propagating in [001].
The asymmetric unit of the title compound, C(22)H(28)N(2)O(3)·CH(4)O, consists of two independent Schiff base mol-ecules and two independent methanol solvent mol-ecules. In one Schiff base mol-ecule, the 2-hydr-oxy group forms an intra-molecular hydrogen bond with the amide O atom, whereas in the other Schiff base mol-ecule, the 2-hydr-oxy-substituted benzene ring is oriented so that the 2-hydr-oxy group serves as hydrogen-bond acceptor for the amide NH group. In the crystal structure, Schiff base mol-ecules inter-act with methanol solvent to furnish a hydrogen-bonded chain.
In the planar title mol-ecule, C(16)H(16)N(2)O(4)·C(2)H(6)O, the planar Schiff base molecule is linked to the ethanol solvent mol-ecule by a hydr-oxy-amide hydrogen bond. The hydr-oxy group of the ethanol mol-ecule is a hydrogen-bond donor to the double-bonded N atom of an adjacent Sciff base, pairs of interactions taking place across a center of symmetry and giving rise to a hydrogen-bonded dimer.
In the title compound, C(17)H(15)N(3)O(2)·C(2)H(6)O, Schiff base molecules are linked by a hydr-oxy-amido hydrogen bond into a helical chain running along the b axis. This chain is consolidated by two other hydrogen bonds; the ethanol solvent mol-ecule is a hydrogen-bond donor to the amide group and a hydrogen-bond acceptor for the indolyl NH group of an adjacent Schiff base mol-ecule.
In the crystal structure of the title Schiff-base, C(20)H(21)N(3)O(4), the amino group forms an N-H⋯O hydrogen bond to the acetyl group of an adjacent mol-ecule, forming a zigzag chain. The 2-hydr-oxy group is inter-nally hydrogen bonded to the amido group though an O-H⋯O hydrogen bond.
The title Schiff base compound, C(13)H(11)NO(5)S·3H(2)O, formed from sulfanilic acid and 2,4-dihydroxy-benzaldehyde, crystallized out as a zwitterion with the N atom protonated. The asymmetric unit consists of one 4-[(2,4-dihydroxy-benzyl-idene)ammonio]benzene-sulfonate and three water mol-ecules. The zwitterion exists in an E configuration with respect to the central C=N double bond. The two benzene rings of the mol-ecule are oriented at a dihedral angle of 27.33 (8)°. An intra-molecular N-H⋯O hydrogen bond stabilizes the mol-ecular structure. In the crystal, the zwitterions are linked into chains along [101] by inter-molecular O-H⋯O and N-H⋯O hydrogen bonds. The three water mol-ecules link these chains into a three-dimensional framework by additional inter-molecular O-H⋯O hydrogen bonds. A π⋯π inter-action [3.5485 (9) Å] further stabilizes the crystal structure.
In the title Schiff base, C(17)H(14)Cl(4)N(2), the atoms of one of the 2,6-dichloro-benzyl-idene units and the central 1,2-diamino-propane grouping are disordered over two sets of sites in a 0.8838 (12):0.1162 (12) ratio. The dihedral angles between the ordered benzene ring and its disordered counterparts are 57.41 (12) and 54.8 (6)° for the major and minor disorder components, respectively. The crystal studied was a racemic twin, the refined ratio of the twin components being 0.37 (5):0.63 (5).
The title Schiff base compound, C(23)H(30)N(2)O(2), has crystallographic twofold rotation symmetry. An intra-molecular O-H⋯N hydrogen bond forms a six-membered ring, producing an S(6) ring motif. The imino group is coplanar with the benzene ring. The two benzene rings are almost perpendicular to each other, making a dihedral angle of 87.38 (4)°. In the crystal structure, neighbouring mol-ecules are linked along the c axis by weak inter-molecular C-H⋯O hydrogen bonds and are further packed into columns along the b axis, forming sheets which are parallel to the bc plane.
The anion in the title compound, (C(7)H(11)N(2))[SnBr(2)(CH(3))(2)(C(6)H(4)Br)], is five-coordinate within a distorted trans-C(3)SnBr(2) trigonal-bipyramidal geometry. The cation and anion are linked by an N-H⋯Br hydrogen bond.
The five-coordinate Sn atom in the title salt, [(CH(3))(3)(C(6)H(6))N][SnBr(2)(C(6)H(5))(3)], exists in a distorted trans-C(3)SnBr(2) trigonal-bipyramidal coordination geometry. In the crystal structure no obvious hydrogen bonding is observed.
The mol-ecule of the title compound, [Sn(C(5)H(5)S)(4)], lies on a special position of site symmetry. The Sn(IV) atom shows a slightly distorted tetra-hedral coordination.
The Sn(IV) atom of the stannate anion in the title salt, (C(7)H(11)N(2))(2)[SnBr(4)(C(6)H(5))(2)], lies on a center of inversion in a tetra-gonally compressed octa-hedron. The two independent Br atoms in the anion are hydrogen-bond acceptors for the same cation.
In the centrosymmetric title compound, [Sn(4)Br(2)(C(6)H(5))(8)O(2)(OH)(2)], the four tin(IV) atoms are bridged by the hydroxo and oxo ligands, forming a ladder-like array of three edge-connected Sn(2)O(2) squares. The two independent tin atoms show distorted trigonal-bipyramidal SnC(2)O(3) and SnC(2)O(2)Br coordination geometries.
The title compound, C13H18N2O2S, adopts a cis conformation between the methyl-benzoyl and thiono groups across their thio-urea C-N bond. However, the methyl-benzoyl group and N2CS thio-urea moiety are twisted by 15.03 (3)°. In the molecule there is an N-H⋯O hydrogen bond. In the crystal, mol-ecules are linked by O-H⋯O inter-actions, generating chains extending along the c-axis direction.
The complete title molecule, C23H19N3O2, is generated by a twofold axis passing through the central ring. The two oxymethyl-benzo-nitrile arms are attached at the meta positions of the central pyridine ring. The dihedral angle between the pyridine ring and benzene ring of both arms is 84.55 (6)° while the benzene rings make a dihedral angle of 46.07 (7)°. In the crystal, weak C-H⋯π inter-actions link the molecules sheets parallel to the ac plane.
Refluxing a mixture of 1,10-phenanthroline, (4-fluoro-phen-yl)thio-urea and cadmium(II) chloride did not produce the expected mixed-ligand complex but formed a co-crystal of the two ligands, C12H8N2·C7H7FN2S. The asymmetric unit consists of two pairs of the co-crystal mol-ecules. In each (4-fluoro-phen-yl)thio-urea mol-ecule, the planes of the N2CS thio-urea units are almost perpendicular to the corresponding fluoro-benzene rings, subtending angles of 76.53 (7) and 85.25 (7)°. In the crystal, N-H⋯N and N-H⋯S hydrogen bonds form inversion dimers from the co-crystal pairs. A weak π-π inter-action between the phenanthroline rings [centroid-centroid distance = 3.7430 (15)Å] is also observed.
In the title compound, C10H10Cl2N2OS, the mol-ecule adopts a trans-cis conformation with respect to the position of the carbonyl group and the chloro-phenyl groups relative to the thiono group across the C-N bonds. The mol-ecule is stabilized by an N-H⋯O hydrogen bond. In the crystal, mol-ecules are linked by N-H⋯S and C-H⋯O hydrogen bonds, forming zigzag chains along the b-axis direction. C-H⋯π inter-actions are also present.