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4-Methyl-benzaldehyde thio-semi-carbazone.

ABSTRACT: The title compound, C(9)H(11)N(3)S, was prepared by reacting 4-methyl-benzaldehyde with thio-semicarbazide. An intra-molecular N-H⋯N hydrogen bond helps to establish the observed mol-ecular conformation. The crystal packing is realized by inter-molecular N-H⋯S hydrogen bonds.

SUBMITTER: Zhang J

PROVIDER: S-EPMC2969930 | biostudies-literature |

REPOSITORIES: biostudies-literature

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4-Cyano-benzaldehyde thio-semi-carbazone.

Project description:The mol-ecule of the title compound, C(9)H(8)N(4)S, adopts an E configuration about both the C=N and C-NH bonds. In the crystal structure, adjacent mol-ecules are linked by inter-molecular N-H?S hydrogen-bonding inter-actions, forming chains running parallel to the b axis.

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3,4-Dihydroxy-benzaldehyde thio-semi-carbazone.

Project description:The asymmetric unit of the title compound, C(8)H(9)N(3)O(2)S, contains three independent mol-ecules which are stacked approximately over each other. In the crystal structure, centrosymmetric pairs of mol-ecules are formed through inter-molecular hydr-oxy-hydr-oxy O-H?O and hydr-oxy-sulfur O-H?S hydrogen bonds which are, in turn, linked into a two-dimensional network by N-H?O(hydr-oxy) hydrogen bonds.

| S-EPMC2961592 | biostudies-literature

3-Methoxy-benzaldehyde thio-semi-carbazone.

Project description:The title compound, C(9)H(11)N(3)OS, was prepared by the reaction of 3-methoxy-benzaldehyde and thio-semicarbazide. The benzyl-idene ring and the thio-semicarbazone fragment are slightly twisted, making a dihedral angle of 14.1 (1)°. A weak intra-molecular N-H⋯N hydrogen bond may influence the conformation of the mol-ecule. Inter-molecular N-H⋯S hydrogen bonds build up a three-dimensional network.

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Crystal structure of a new monoclinic polymorph of 2,4-di-hydroxy-benzaldehyde 4-methyl-thio-semi-carbazone.

Project description:The title compound, C9H11N3O2S, is a second monoclinic (P21/c) polymorph of the previously reported Cc form [Tan et al. (2008b ▶). Acta Cryst. E64, o2224]. The mol-ecule is non-planar, with the dihedral angle between the N3CS residue (r.m.s. deviation = 0.0816 Å) and the benzene ring being 21.36 (4)°. The conformation about the C=N bond [1.292 (2) Å] is E, the two N-bound H atoms are anti, and the inner hy-droxy O-bound and outer amide N-bound H atoms form intra-molecular hydrogen bonds to the imine N atom. Crucially, the H atom of the outer hy-droxy group is approximately syn to the H atom of the benzene C atom connecting the two C atoms bearing the hy-droxy substituents. This arrangement enables the formation of supra-molecular tubes aligned along [010] and sustained by N-H⋯O, O-H⋯S and N-H⋯S hydrogen bonds; the tubes pack with no specific inter-actions between them. While the mol-ecular structure in the Cc form is comparable, the H atom of the outer hy-droxy group is approximately anti, rather than syn. This different orientation leads to the formation a three-dimensional architecture based on N-H⋯O and O-H⋯S hydrogen bonds.

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Crystal structure of 4-hy-droxy-3-meth-oxy-benzaldehyde 4-methyl-thio-semi-carbazone methanol monosolvate.

Project description:In the title solvate, C15H15N3O2S·CH3OH, the thio-semicarbazone mol-ecule is approximately planar; the maximum deviation from the mean plane is 0.4659 (14) Å and the dihedral angle between the aromatic rings is 9.83 (8)°. This conformation is supported by an intra-molecular N-H⋯N hydrogen bond. In the crystal, the thio-semicarbazone mol-ecules are linked into dimers by pairs of N-H⋯S hydrogen bonds, thereby generating R 2 (2)(8) loops. The methanol solvent mol-ecule bonds to the thio-semicarbazone mol-ecule through a bifurcated O-H⋯(O,O) hydrogen bond and also accepts an O-H⋯O link from the thio-semicarbazone mol-ecule. Together, these links generate a three-dimensional network.

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2-Acetyl-pyrazine 4-methyl-thio-semi-carbazone.

Project description:The title compound, C(8)H(11)N(5)S, has been prepared by the reaction of 2-acetyl-pyrazine with 4-methyl-3-thio-semi-carbazide. It exists in the thione form and adopts the E configuration. The mol-ecules are connected by the inter-molecular N-H?N and N-H?S inter-actions.

| S-EPMC2915049 | biostudies-literature

Pyridine-2-carbaldehyde thio-semi-carbazone.

Project description:The asymmetric unit of the title compound, C(7)H(8)N(4)S, contains two independent mol-ecules with slightly different conformations; the dihedral angles between the pyridine ring and mean plane of the thio-semicarbazone unit in the two mol-ecules are 2.88?(5) and 6.30?(5)°. Inter-molecular N-H?N and N-H?S hydrogen bonds link the mol-ecules into layers parallel to the ab plane.

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Ferrocene-1-carbaldehyde thio-semi-carbazone.

Project description:The asymmetric unit of the title compound, [Fe(C(5)H(5))(C(7)H(8)N(3)S)], consists of two crystallographically independent mol-ecules, A and B. The cyclo-penta-dienyl (Cp) rings in both mol-ecules adopt an eclipsed conformation and are parallel to each other, forming dihedral angles of 2.5?(3) and 1.1?(3)°, respectively. The mean plane of the semicarbazone group is coplanar with the attached Cp ring in mol-ecule A, whereas it is twisted away in mol-ecule B. In the crystal structure, inter-molecular N-H?S hydrogen bonds link the mol-ecules into two-dimensional planes parallel to the ab plane. The structure is further consolidated by C-H?? inter-actions.

| S-EPMC2979593 | biostudies-literature

1-(Thio-phen-2-yl)ethanone thio-semi-carbazone.

Project description:The title compound, C(7)H(9)N(3)S(2), crystallizes with two unique mol-ecules in the unit cell, both present as thio-semicarbazide tautomers. The mol-ecules differ principally in the dihedral angles between the thio-phene ring planes and the planes through the non-H atoms of the hydrazinecarbothio-amide units, viz. 9.80?(8)° for one mol-ecule and 19.37?(7)° for the other. The hydrazinecarbothio-amide units are reasonably planar, with r.m.s. deviations of 0.001Å for each of the mol-ecules. In the crystal, N-H?S hydrogen bonds link like mol-ecules into R(2) (2)(8) inversion dimers. A three-dimensional network structure is generated by additional N-H?S hydrogen bonds and weak C-H?S contacts between the unique mol-ecules.

| S-EPMC3089127 | biostudies-literature

1H-Indole-3-carbaldehyde thio-semi-carbazone.

Project description:The mol-ecules of the title compound, C(10)H(10)N(4)S, are linked by N-H(indole)⋯S hydrogen bonds to form a linear hydrogen-bonded chain. There are two independent mol-ecules in the asymmetric unit.

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