Sn(SO₄)₂·2H₂O from synchrotron powder data

Tin(IV) sulfate dihydrate comprises of (100) layers of [SnO₄(H₂O)₂] octa­hedra corner-connected by sulfate tetra­hedra, and with O—H⋯O hydrogen-bonding between the layers.

trans-Bis(quinoline-8-amine-κ²N,N′)bis­(1,1,3,3-tetra­cyano-2-meth­oxy­propenido-κN)iron(II)

[Fe(C₈H₃N₄O)₂(C₉H₈N₂)₂] exhibits a distorted octa­hedral coordination geometry. The coordination sphere of the iron(II) ion is composed of bidentate quinoline-8-amine in the equatorial sites while the axial sites are occupied by 1,1,3,3-tetra­cyano-2-meth­oxy­propenide anions.

Poly[di­aqua­[μ₂-1,4-bis­(pyridin-3-ylmeth­yl)piperazine][μ₂-4-(2-carboxyl­atoeth­yl)benzoato]cobalt(II)]

A layered cobalt coordination polymer containing both 4-(2-carboxyl­atoeth­yl)benzoate (ceb) and N,N′-bis­(3-pyridyl­meth­yl)piperazine (3-bpmp) ligands, [Co(ceb)(3-bpmp)(H₂O)₂]_n, was isolated and structurally characterized by single-crystal X-ray diffraction.

1-[(2-Chloro­phen­yl)di­phenyl­meth­yl]-1H-pyrazole

The title compound C₂₂H₁₇ClN₂, also named as TRAM-34, crystallizes in the monoclinic space group P2₁/n. The dihedral angles between the pyrazole ring and the three six-membered rings are 62.28 (9), 69.48 (9) and 71.30 (9)°.

rac-2-{3-[1-(Acet­yloxy)eth­yl]-2,2-di­methyl­cyclobut­yl}acetic acid

The title compound was prepared from α-pinene in three steps. The ester and acid moieties are cis on the slightly folded cyclo­butane ring. In the crystal, carb­oxy­lic acid bound dimers form layers parallel to (202).

3-(2-Hy­droxy­eth­yl)-1-(4-nitro­phen­yl)-1H-benzo[d]imidazol-3-ium bromide

In the crystal of the title salt, the bromide ions act as double acceptors for hydrogen bonds from a hydroxyl group (O—H⋯Br) and a fused imidazolium moiety (C—H⋯Br). Additionally, C—H⋯O hydrogen bonds between the phenyl group and hydroxyl oxygen atom create a two-dimensional supra­molecular network extending diagonally in the crystallographic bc plane.

6-Bromo-9,9-di­ethyl-N,N-di­phenyl­fluoren-2-amine

In the title compound, the dihedral angles between the fluorene fused-ring system and the pendant phenyl groups are 67.76 (12) and 88.38 (12)°. In the crystal, weak pairwise C—H⋯π inter­actions link the mol­ecules into inversion dimers.

Ethyl 4-[(2-hy­droxy­eth­yl)amino]-2-(4-meth­oxyphen­yl)-1-methyl-5-oxo-2,5-di­hydro-1H-pyrrole-3-carboxyl­ate

In the title compound, the pyrrolidine and phenyl rings are almost perpendicular and an intra­molecular N—H⋯O hydrogen bond occurs.

3-Iodo­aniline

The asymmetric unit of the title compound, the meta-iodinated derivative of aniline, contains two complete mol­ecules. In the crystal, cooperative hydrogen bonds of the N–H⋯N type connect the mol­ecules into infinite chains along the a-axis direction. Dispersive I⋯I contacts extend these chains to sheets perpendicular to the crystallographic c axis.