Crystal structure of 5-methylpyrazine-2-carbohydrazide, C6H8N4O

The Crystal Structure of Monoaquabis(trans-5- -methylpyrazine-2-carboxylato-N,O)copper(II) Trihydrate

N′-[(1E)-(5-Nitro­furan-2-yl)methyl­idene]thio­phene-2-carbohydrazide: crystal structure and Hirshfeld surface analysis

In the title carbohydrazide, C10H7N3O4S, the dihedral angle between the terminal five-membered rings is 27.4 (2)°, with these lying to the same side of the plane through the central CN2C(=O) atoms (r.m.s. deviation = 0.0403 Å), leading to a curved mol-ecule. The conformation about the C=N imine bond [1.281 (5) Å] is E, and the carbonyl O and amide H atoms are anti. In the crystal, N-H⋯O hydroge...

Crystal structure of 5-hy­droxy­methyl-2-meth­oxy­phenol

In the title compound, C8H10O3, the hy-droxy-methyl group is twisted by 74.51 (13)° from the plane of the benzene ring to which it is connected. By contrast, the benzene and meth-oxy groups are almost coplanar, making a dihedral angle of 4.0 (2)°. In the crystal, O-H⋯O hydrogen bonds link the mol-ecules into a three-dimensional network.

Crystal structure of (E)-N′-benzyl­idene-1-methyl-4-nitro-1H-pyrrole-2-carbohydrazide

In the title compound, C13H12N4O3, the dihedral angle between the planes of the pyrrole and benzene rings is 7.47 (1)°. In the crystal, mol-ecules are arranged in sheets lying parallel to (101). Neighbouring sheets are linked by N-H⋯O hydrogen bonds, weak π-π [centroid-centroid distance between the pyrrole rings = 3.765 (11) Å] and C-H⋯π inter-actions, forming a three-dimensional structure.

Crystal structure of 2-oxo-N′-phenyl-2H-chromene-3-carbohydrazide

In the title compound, C16H12N2O3, the 2H-chromene moiety is essentially planar, with an r.m.s. deviation of the nine constituent atoms from the mean plane of 0.0093 Å, and makes a dihedral angle of 76.84 (3)° with the pendant phenyl ring. An intra-molecular N-H⋯O hydrogen bond helps to determine the conformation of the side chain. In the crystal, N-H⋯O and N-H⋯N hydrogen bonds link the mol-ecu...