Redetermination of the crystal structure of arsenic tribromide, AsBr₃

The crystal structure of AsBr₃ was redetermined by low-temperature single-crystal X-ray diffraction, leading to higher precision in the obtained bond lengths and angles.

Crystal structure of Al_8.77Fe_0.80Ni_1.20Si_0.23

The Al_8.77Fe_0.80Ni_1.20Si_0.23 (aluminium iron nickel silicate) phase, obtained via high-pressure sinter­ing of an Al-rich prealloy (nominal composition Al_78.08Fe_8.65Ni_8.69Si_4.58), is characterized as a novel phase in the Al—Si—Ni—Fe quaternary system.

Di­chlorido­bis­(3-{[(pyridin-2-yl)methyl­idene]amino}­benzoic acid-κ²N,N′)cobalt(II) methanol monosolvate monohydrate

Two chlorido and two chelating pyridinyl­imino­benzoic acid ligands coordinate a cobalt(II) centre with the carb­oxy­lic being non-coordinating.

On the crystal structure of tri­benzyl­tin(IV) iodide, Bz₃SnI: a correction

Single crystals of tri­benzyl­tin(IV) iodide, prepared from hexa­benzyl­distannoxane, Bz₃SnOSnBz₃, and hydro­iodic acid, have been characterized by single-crystal X-ray diffraction in order to clarify some inconsistencies in the original structure determination. In particular, the present study provides a significantly longer tin–iodide distance, which corresponds much better with those in related structural studies.

trans-Di­aqua­bis­(pyridin-2-yl thio­phen-2-yl ketone-κ²N,O)nickel(II) bis­(tetra­fluorido­borate)

The Ni^II atom in the complex cation of the title salt is located on an inversion center and shows a pseudo-octa­hedral coordination with two ligands bound through the carbonyl oxygen and pyridyl nitro­gen atoms in the equatorial and two aqua ligands in the axial positions.

{5,15-Bis[3,5-bis­(6′-methyl-2,2′-bi­pyridyl-6-yl)phen­yl]-10,20-di­phenyl­porphyrin}zinc(II) 1,2-di­meth­oxy­ethane 0.296-solvate

In the title compound, the porphyrin macrocycle is essentially planar, with the Zn atom located in the plane on an inversion centre. The bi­pyridine units are located on both sides of the porphyrin plane due to the substitution at the 3- and 5-positions of the meso-phenyl ring. One bi­pyridine moiety folds back towards the porphyrin, while the other extends away from the porphyrin.

3-(4-Ferrocenylphen­yl)-1-(4-nitro­benz­yl)-1H-imidazol-3-ium hexa­fluorido­phosphate

In the title ferrocenylphenyl functionalized imidazolium salt, the 1-(4-ferrocenylphen­yl)-3-(4-nitro­benz­yl)imidazolium cation adopts a syn-periplanar arrangement, with the ferrocenylphenyl substituent tilted by 38.32 (7)° relative to the imidazolium core. In the crystal, inter­ionic C—H⋯F hydrogen bonds generate graph-set motifs R¹₂(7) and R²₁(4), assembling the ions into chains that propagate along the c-axis direction.

(E)-1-(3,3′-Dimeth­oxy-4′-{[(E)-4-nitro­benzyl­idene]amino}-[1,1′-biphen­yl]-4-yl)-N-(4-nitro­phen­yl)methanimine

The title compound crystallizes in the monoclinic space group I2/a with one half-mol­ecule in the asymmetric unit. The structure exhibits non-planar Schiff base moieties, extended π-conjugation, and a supra­molecular framework consolidated by C—H⋯O, π–π stacking, and C—H⋯π inter­actions forming layers parallel to the (101) plane.

1,3′-Di­methyl-2-oxo-6′-phenyl-7′H-spiro­[indoline-3,4′-isoxazolo[5,4-b]pyridine]-5′-carbo­nitrile

In the two mol­ecules in the asymmetric unit of the title compound, C₂₂H₁₆N₄O₂, the isoxazole ring is inclined to the pyridine ring system, the indoline ring, and the phenyl ring by 8.00 (10), 70.93 (10), and 35.89 (12)°, respectively, for mol­ecule A, and 4.24 (10), 84.62 (9), and 30.02 (11)° for mol­ecule B. In the crystal, mol­ecules are linked by N—H⋯O, C—H⋯O and C—H⋯N inter­actions, forming layers parallel to the (100) plane.

Di­methyl 2,7-di-tert-butyl­pyrene-4,9-di­carboxyl­ate

The title compound crystallizes in space group Pbca with four mol­ecules in the unit cell.

1,3-Bis(4-bromo­phen­yl)-1H-imidazol-3-ium tetra­fluoro­borate

The crystal structure of the title imidazolium salt exhibits structure-directing, inter­molecular halogen-bonding patterns through F⋯Br and F⋯π_phen­yl inter­actions via the tetra­fluoro­borate anion.

2-Meth­oxy-4-[1-(4-meth­oxy­phen­yl)-4,5-di­phenyl-1H-imidazol-2-yl]phenol

In the title compound, which was synthesized via a four-component Debus–Radziszewski reaction, the OH group of the vanillin substituent forms both an intra­molecular and an inter­molecular hydrogen bond, the latter generating [010] chains. The extended structure is consolidated by weak C—H⋯O and C—H⋯π inter­actions, generating a criss-cross motif.

A polymorph of N′-[(4-hy­droxy­phen­yl)methyl­­idene]pyridine-4-carbohydrazide

The crystal structure of a polymorph of N′-[(4-hy­droxy­phen­yl)methyl­idene]pyridine-4-carbohydrazide reveals a distinct supra­molecular arrangement arising from variations in inter­molecular hydrogen bonding relative to the known polymorph.