(Al_13.28Si_2.72)(Fe_1.19Ni_2.81)

The crystal structure of (Al_13.28Si_2.72)(Fe_1.19Ni_2.81) comprises eight sites in the asymmetric unit, one of which is co-occupied by pairs of (Al,Si) atoms, and two by pairs of (Fe,Ni) atoms.

Al_48.18Cr_22.78Fe_4.04Si₃

The title quaternary inter­metallic material is a new γ-brass obtained using a high-pressure sinter­ing process.

Piperazin-1-ium tri­aqua­dibromido­sodium

In the title compound, the complete organic cation, which adopts a typical chair conformation, is generated by crystallographic inversion symmetry and one of the N-bonded H atoms is half occupied. The sodium ion (site symmetry m) at the centre of the complex anion adopts a distorted trigonal–bipyramidal coordination geometry with the water mol­ecules in the equatorial sites and the bromide ions in the axial sites. In the extended structure, O—H⋯Br hydrogen bonds generate a porous ‘honeycomb' three-dimensional network of complex anions encapsulating [010] channels occupied by the cations.

Bis[N′-(2-methyl­propyl­idene)-4-(prop-2-en-1-yl­oxy)benzohydrazidato-κ²N′,O]nickel(II)

In the bis-chelated mononuclear nickel(II) title complex with benzohydrazide ligands bearing an all­yloxy group, the nickel(II) atom exhibits a slightly distorted square-planar coordination environment with the metal located on a crystallographic center of symmetry that induces a trans configuration of the N,O chelating ligands..

Bis{2-[bis­(2-hy­droxy­eth­yl)amino]­acetato}­zinc(II) monohydrate

The Zn^II atom in the title compound has distorted octa­hedral N₂O₄ coordination geometry. The inter­molecular inter­actions in the crystal structure consist of O–H⋯O and weak C–H⋯O hydrogen bonds.

catena-Poly[[[penta­aquadysprosium(III)]-μ-5-az­anium­ylisophthalato] dichloride monohydrate]

The title compound contains zigzag polymeric chains built up from nine-coordinated Dy^III centers and bridging 5-az­an­ium­yl­isophthalate ligands.

Methyl 4,6-O-benzyl­idene-α-D-gluco­pyran­oside monohydrate

The title compound is a hydrated, partially protected derivative of D-gluco­pyran­ose. Inter­molecular inter­actions connect the entities of the asymmetric unit to a three-dimensional network.

(E)-2,4-Di­amino-5-{7-[(4-chloro­phen­yl)diazen­yl]-3,3-di­methyl-1-oxo-2,3,4,9-tetra­hydro-1H-xanthen-9-yl}-6-oxo-1,6-di­hydro­pyridine-3-carbo­nitrile di­methyl­formamide monosolvate

In the title compound, much of the mol­ecule (excluding the pyridinic ring) is approximately planar. In the extended structure, various hydrogen bonds combine to form a layer structure parallel to (111).

N,N′-Bis[tris­(hy­droxy­meth­yl)meth­yl]propane-1,3-di­amine (bis-tris propane)

The crystal structure of a reagent frequently used for the preparation of buffer solutions is reported, showing that the mol­ecule lies on a crystallographic mirror plane, and has a bent conformation.

Triclinic polymorph of 1-hy­droxy­cyclo­hexa­necarb­oxy­lic acid

The title compound is a derivative of cyclo­hexa­necarb­oxy­lic acid bearing a hydroxyl group in its α-position and is a polymorph of the previously reported monoclinic form.

Cetylpyridinium bromide monohydrate: localization of H atoms

The title compound, C₂₁H₃₈N⁺·Br⁻·H₂O, is the bromide salt of a quarternary pyridinium cation bearing a hexa­decyl chain on the nitro­gen atom. One mol­ecule of solvent water is present in the asymmetric unit. Classical hydrogen bonds of the O—H⋯Br type are observed next to C—H⋯Br and C—H⋯O contacts that connect the entities of the title compound to sheets parallel to the ab plane.

2-(4-Hy­droxy­phen­yl)acetamide

In the title mol­ecule, an isomer of acetamino­phen, the acetamide plane is perpendicular to the phenyl ring plane with the –NH₂ group directed outward, in contrast to an in vacuo DFT geometry optimization in which the –NH2 group is directed inward.

2-Oxo-2H-chromen-7-yl 2,2-di­methyl­propionate

In the title compound, the dihedral angle between the 2H-chromen-2-one moiety and the C—CO₂ ester grouping is 54.30 (5)°. In the crystal, the mol­ecules are linked by C—H⋯O hydrogen bonds forming C(6) [100] chains.

2-Oxo-2H-chromen-7-yl 4-ethyl­benzoate

In the title compound, C—H⋯O hydrogen bonds generate infinite (101) sheets.

4-[5-(4-Fluoro­phen­yl)-1,2-oxazol-4-yl]pyridine

The title compound, C₁₄H₉FN₂O, crystallizes in the monoclinic space group P2₁/c. The dihedral angles between the central isoxazole ring and the 4-fluoro­phenyl and pyridine rings are 32.64 (5) and 32.70 (7)°, respectively.

L-Valine ethyl ester hydro­chloride

The title compound is the hydro­chloride salt of the ethyl ester of L-valine. Inter­molecular inter­actions connect the entities of the asymmetric unit into sheets lying parallel the the bc plane.

2-(4-Chloro­phen­yl)-1,3-dioxane – localization of hydrogen atoms

The title compound is the acetal of 4-chloro­benzaldehyde and 1,3-propane­diol. In the crystal, weak C—H⋯O contacts connect the mol­ecules to centrosymmetric dimers.

1-(4-Methyl­benzene­sulfon­yl)-1-phenyl-1H,2H-cyclo­buta[c]quinoline

The title compound forms strands along the b-axis direction via hydrogen bonds from the tolyl group to the sulfonyl oxygen atoms. The tricyclic framework is almost planar and the two six-membered aromatic substituents are nearly coparallel.