5-Methylpyrazine-2-carboxamide

(S)-5-Oxo-N-phenyl­pyrrolidine-2-carboxamide

The title compound, C(11)H(12)N(2)O(2), shows an S configuration, in which the pyrrolidinone ring is twisted with respect to the phenyl plane, making a dihedral angle of 70.73 (7)°. In the crystal, mol-ecules are linked by N-H⋯O hydrogen bonds, building up a layer parallel to (001).

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

5-Methyl-N-[2-(trifluoro­meth­yl)phen­yl]isoxazole-4-carboxamide

In the title compound, C(12)H(9)F(3)N(2)O(2), the benzene ring is nearly perpendicular to the isoxazole ring, making a dihedral angle of 82.97 (2)°. In the crystal, mol-ecules are linked by N-H⋯O hydrogen bonds into a supra-molecular chain running along the c axis.

N-(2-Hy­droxy­eth­yl)-5-(4-meth­oxy­phen­yl)-4H-pyrazole-3-carboxamide

In the title compound, C(13)H(15)N(3)O(3), the dihedral angle between the benzene and pyrazole rings is 7.7 (1)° and the O-C-C-N torsion angle of the side chain is 74.1 (2)°. In the crystal, mol-ecules are linked by O-H⋯O, N-H⋯O and N-H⋯N hydrogen bonds.

5-Methyl-N-(1,3-thia­zol-2-yl)isoxazole-4-carboxamide

In the title compound, C8H7N3O2S, the dihedral angle between the thia-zol and isoxazole rings is 34.08 (13)°. In the crystal, the mol-ecules are linked by pairs of N-H⋯N hydrogen bonds, forming inversion dimers, and C-H⋯O inter-actions, resulting in chains along the b-axis direction.