Redetermination of the crystal structure of K[BrF₄] from single-crystal X-ray diffraction data

The crystal structure of KBrF₄ was refined against single-crystal X-ray diffraction data and compared with the previous results.

Bis(4-methyl­benzyl­ammonium) tetra­bromido­zincate

In the organic–inorganic hybrid material, (C₈H₁₂N)₂[ZnBr₄], tetra­hedral [ZnBr₄]²⁻ anions are connected by N—H⋯Br and C—H⋯Br hydrogen bonds to the 4-methyl­benzyl­ammonium cations.

Chlorido­(η⁶-p-cymene)[2-(5-phenyl-4H-1,2,4-triazol-3-yl-κN²)pyridine-κN]ruthenium(II) chloride

The crystal structure of a p-cymene-based ruthenium(II) complex featuring rather unusual hydrogen bonding has been determined.

Poly[di­aqua­bis­(μ-hydrogen benzene-1,2,4-tri­carboxyl­ato)copper(II)disodium]: a novel 4,5,6-connected trinodal net

In the title compound, [CuNa₂(C₉H₄O₆)₂(H₂O)₄]_n, the Cu^II cations are square-planar coordinated by carboxyl­ate O-atom donors from four different hydrogen benzene-1,2,4-tri­carboxyl­ate (btcH) ligands, thereby forming [Cu(btcH)₂]_n²ⁿ⁻ coordination polymer ribbons. These are connected by octa­hedrally coordinated and hydrated Na^I cations within Na₂(μ-H₂O)₂ clusters to construct the full [Na₂(H₂O)₄Cu(btcH)₂]_n three-dimensional coordination polymer.

Crystal structure of a zwitterionic aza­allyl zirconiumamide complex bearing a Zr⁺-μ-CH₃—B⁻ moiety and one equivalent of n-hexane as a solvent

The title mol­ecule is zwitterionic, comprising a Zr⁺—μ-CH₃—B⁻ moiety.

Tris(1,10-phenanthroline-κ²N,N′)nickel(II) bis­(hexa­fluorido­phosphate)

The asymmetric unit of the title compound, [Ni(C₃₆H₂₄N₆)₃](PF₆)₂, contains one and a half nickel(II) complex dications and three hexa­fluorido­phosphate anions; one of the dications having crystallographic twofold rotational symmetry.

4,5-Diferrocenyl-1,2-di­thiol-3-one

The title compound crystallizes with two mol­ecules in the asymmetric unit. The cyclo­penta­dienyl rings of the ferrocenyl moieties adopt eclipsed conformations.

Bis[N⁵,N⁷-bis­(pyridin-2-yl)-6,7-di­hydro-5H-pyrrolo­[3,4-b]pyrazine-5,7-di­imine]­cobalt(III) perchlorate aceto­nitrile disolvate

The title complex cation possesses twofold rotational symmetry, with the octa­hedrally coordinated cobalt(III) atom being located on a twofold rotation axis.

Tetra­ethyl­ammonium (aceto­nitrile)­tri­chlorido­palladate(II)

In the title compound, the Pd atom is coordinated by three chlorine atoms and one aceto­nitrile.

catena-Poly[bis­(4-methyl­benzyl­ammonium) [[di­bromido­cadmate(II)]-di-μ-bromido]]

An organic–inorganic hybrid salt is comprised of methyl­benzyl­ammonium cations that are situated between ²_∞[CdBr_4/2Br_2/2]²⁻ anionic layers extending parallel to the ac plane.

5′-Nitro-1,4-di­hydro­spiro­[3,1-benzoxazine-2,3′-indolin]-2′-one

In the title compound, C₁₅H₁₁N₃O₄, the oxazine ring exhibits a half chair conformation, and the pyrrolidine ring adopts an envelope conformation; the dihedral angle between them is 78.63 (9)°. In the crystal, mol­ecules are linked via N—H⋯O and C—H⋯O hydrogen bonds into sheets parallel to the bc plane.

Ethyl 2-[(2E)-4-decyl-3-oxo-1,2,3,4-tetra­hydro­quinoxalin-2-yl­idene]acetate

The mol­ecular and crystal structure of the title tetra­hydro­quinoxaline derivative is reported. The crystal structure is stabilized by C—H⋯O hydrogen bonds and π-stacking inter­actions. Inter­calation of the n-decyl chains completes the crystal packing.

(5Z,7Z)-N⁵,N⁷-Bis(pyridin-2-yl)-5H-6,7-di­hydro­pyrrolo­[3,4-b]pyrazine-5,7-di­imine

The title compound exhibits symmetric three-centre (bifurcated) intra­molecular hydrogen bonds. In the crystal, mol­ecules are linked via C—H⋯N hydrogen bonds, forming 3₁ helices along the c-axis direction.

1,1-Bis(di­phenyl­phosphor­yl)hydrazine

The title compound OPPh₂—N(NH₂)-Ph₂PO contains a diphosphazane backbone, as well as a hydrazine entity which are nearly planar.

Diiso­propyl­ammonium hydrogen phthalate

The crystal structure of diiso­propyl­ammonium hydrogen phthalate exhibits N—H⋯O hydrogen-bonded chains that are linked by weak C—H⋯O hydrogen bonds to form pleated sheets.

5-Nitro-N²,N³-bis­[(1R,2R,4R)-1,7,7-tri­methylbi­cyclo[2.2.1]heptan-2-yl]isophthalamide di­chloro­methane hemisolvate

The title compound crystallizes with two chiral isophthalamide–camphor mol­ecules and one di­chloro­methane solvent mol­ecule in the asymmetric unit.