Bis(pyrrolidinium) hexa­chlorido­stannate: a redetermination

The crystal structure of the title compound, 2C₄H₈NH₂⁺·SnCl₆²⁻, has been redetermined at 180 K. The N atom of the pyrrolidinium cation lies on a mirror plane and the other atoms of the cation are disordered over two sites with respect to the mirror plane. Each component of the disordered five-membered rings adopts a twist conformation. The cations and the anions are connected via N—H⋯Cl hydrogen bonds, forming a tape-like structure propagating along the b-axis direction.

Tetra­aqua­[2,6-di­acetyl­pyridine bis­(semi­carbazone)]samarium(III) trinitrate

The structure of a samarium(III) nitrate salt with the penta­dentate ligand 2,6-di­acetyl­pyridine­bis­(semicarbazone), DAPSC, has been determined at room temperature. Tetra­aqua­[2,6-di­acetyl­pyridine bis­(semicarbazone)]samarium(III) trinitrate is isomorphous with other known lanthanide(III) nitrate complexes with DAPSC. The cations in these structures have four coordinated water mol­ecules such that their coordination geometry is best described as a distorted tricapped trigonal prism. The salts all have three nitrate counter-anions involved in myriad hydrogen bonds with the coordinated water mol­ecules.

trans-Di­chlorido­tetra­kis­(pyridine-κN)rhodium(III) chloride methanol tetra­solvate

The chloride salt of trans-di­chlorido­tetra­kis­(pyridine)­rhodium(III) has been known since 1883. However, no crystal structure of the compound has been reported so far. In this study, the crystal structure of its methanol tetra­solvate is described.

trans-Bis(pyridine-κN)bis­(thio­cyanato-κS)palladium(II)

The central Pd^II ion has a trans-N₂S₂ square-planar coordination sphere defined by two pyridine ligands and two SCN anions.

5-Methyl-1-(4-methyl­phen­yl)-N′-[1-(thio­phen-2-yl)ethyl­idene]-1H-1,2,3-triazole-4-carbohydrazide

The asymmetric unit comprises a mol­ecule of C₁₇H₁₇N₅OS. In the crystal, π–π inter­actions occur between phenyl rings of pairs of adjacent mol­ecules and a weak inter­molecular C—H⋯O inter­action is observed.

5-[(4-Bromo­phen­yl)diazen­yl]-2-{2-[1-(1H-indol-3-yl)ethyl­idene]hydrazin­yl}-4-methyl­thia­zole di­methyl­formamide hemisolvate

The asymmetric unit of the title compound comprises two mol­ecules of the thia­zole C₂₀H₁₇BrN₆S, and one mol­ecule of di­methyl­formamide (DMF) solvent. N—H⋯N hydrogen bonding links four main mol­ecules, forming rings within the crystal. Additional N—H⋯O hydrogen bonds involving the DMF solvent also occur.

Ethyl 2-{[2-(2-eth­oxy-2-oxoeth­oxy)quinolin-4-yl]carbon­yloxy}acetate

In the crystal, C—H⋯O hydrogen bonds and C—H⋯π inter­actions form chains extending along the a-axis direction.

Di­ethyl 4-(4-chloro-2-propyl-1H-imidazol-5-yl)-2,6-di­methyl-1,4-di­hydro­pyridine-3,5-di­carboxyl­ate monohydrate

The mol­ecular and crystal structure of the title imidazole-di­hydro­pyridine derivative is reported. The crystal structure is stabilized by hydrogen bonds involving both the main mol­ecule and the lattice water mol­ecule as well as by C—H⋯π(ring) inter­actions.

Ethyl 4-(3,4,6-tri­methyl-1-phenyl-1H-pyrazolo[3,4-b]pyridin-5-yl)benzoate

In the crystal of the title compound, two pairs of inversion-related C—H⋯π inter­actions form dimers that are connected into stepped layers by additional pairs of C—H⋯π inter­actions.

(Z)-1,2-Bis(3-bromo­phen­yl)diazene 1-oxide

The mol­ecular and crystal structures of the title diazene derivative are reported.

2-Amino-5-chloro­benzo­phenone

An intra­molecular hydrogen bond between the carbonyl-O atom and the amine-H atom from the 2-amino­benzoyl group stabilizes the mol­ecule structure.

Bis(tetra­methyl­guanidinium) hexa­chlorido­tellurate(IV)

In the newly synthesized salt bis­(tetra­methyl­guanidinium) hexa­chlorido­tellurate(IV), the [TeCl₆]²⁻ anion and two TMG cations form weak C—H⋯Cl and N—H⋯Cl hydrogen bonds in the three directions of the unit cell.