This article presents infrared absorption data of amorphous silicon alloys in which the hydrogen isotopes deuterium and tritium have been substituted for hydrogen. Silicon–deuterium and silicon– tritium vibration frequencies are related to silicon–hydrogen vibration frequencies by simple mass relationships. The silicon–deuterium wagging vibration is broadened and blueshifted due to strong coupl...

In the title compound, C(7)H(8)N(2)O(2), the dihedral angle between the pyridinium ring and the carboxyl-atomethyl group is 74.5 (1)°. Strong inter-molecular N-H⋯O hydrogen bonds between the amine and carboxyl-ate groups form a layered hydrogen-bonded network perpendicular to [010]. In addition, there are some weak C-H⋯O hydrogen bonds present in the structure.

In the non-centrosymetric title compound, C(5)H(6)N(3)O(2) (+)·C(2)HO(4) (-), the hydrogen oxalate anions form corrugated chains parallel to the c axis, linked by O-H⋯O hydrogen bonds. The 2-amino-3-nitro-pyridinium cations are anchored between theses chains by N-H⋯O and C-H⋯O hydrogen bonds and van der Waals and electrostatic inter-actions, creating a three-dimensional network.

In the title compound, [PdCl(2)(C(21)H(23)N(3)O)(2)], the Pd(II) atom is located on an inversion centre and is coordinated in a slightly distorted square-planar environment by the chloride and N-heterocyclic carbene (NHC) ligands in mutual trans positions. There are several hydrogen-bonding inter-actions, the most significant of which is a hydrogen bond between the amide moiety of the NHC and t...

In the crystal structure of the title compound, C11H15N3O2S, the C-N-N-C and C-N-C-C torsion angles involving the benzene ring and ethyl group are 11.91 (15) and 99.4 (2)°, respectively. An intra-molecular N-H⋯N hydrogen bond is observed. In the crystal, mol-ecules are linked via N-H⋯O and N-H⋯S hydrogen bonds into a three-dimensional hydrogen bonded network. Finally, the molecules show a herri...

In the title compound, C(11)H(12)N(4)OS, an intra-molecular N-H⋯O hydrogen bond generates an S(6) ring motif. In the crystal, the mol-ecules form a helical chain along the a axis through an N-H⋯O hydrogen bond. These chains are extended by an N-H⋯S hydrogen bond and a C-H⋯π inter-action into a three-dimensional network.

In the crystal structure of the title compound, C(8)H(12)N(+)·C(3)H(3)O(4) (-), the hydrogen malonate anions are linked into infinite chains parallel to the b axis by inter-molecular O-H⋯O hydrogen bonds of the type COO(-)⋯HO(2)C in a head-to-tail fashion. The 4-ethyl-anilinium cations link adjacent anion chains by inter-molecular N-H⋯O hydrogen bonds into a two-dimensional network parallel to ...

In the crystal structure of the title compound, C5H14N2 (2+)·2HC2O4 (-), the two crystallographically independent hydrogen oxalate anions are linked by strong inter-molecular O-H⋯O hydrogen bonds, forming two independent corrugated chains parallel to the b axis. These chains are further connected by N-H⋯O and C-H⋯O hydrogen bonds originating from the organic cations, forming a three-dimensional...

In the title anti-ferromagnetic material, (C(7)H(12)N(2))[ReCl(6)], the Néel temperature is observed at 5 K. The salt is stabilized by an extensive network of N-H⋯Cl and C-H⋯Cl hydrogen bonds, where hydrogen-bonded anion chains and characteristic cation-anion motifs are present. Similar systems play an important role in crystal engineering as hydrogen bonds that can transmit magnetic inter-acti...

In the title compound, C9H10N4OS, the dihedral angle between the benzene and 1H-1,2,4-triazole-5(4H)-thione rings is 67.51 (16)°. In the crystal, mol-ecules are liked via N-H⋯O hydrogen bonds, forming chains along the c-axis direction. The chains are linked via O-H⋯S hydrogen bonds, forming corrugated layers lying parallel to the bc plane. The layers are linked via N-H⋯N and N-H⋯S hydrogen bond...