Redetermination of the γ-form of tellurium dioxide

The crystal structure of γ-TeO₂ has been redetermined on the basis of single-crystal X-ray data. The redetermination confirms the previous model based on powder X-ray data, but with higher precision and accuracy.

Chlorido­bis­(ethane-1,2-di­amine)(4H-1,2,4-triazole-κN¹)cobalt(III) dichloride

The crystal structure of the title compound features N—H⋯N, N—H⋯Cl and C—H⋯Cl inter­actions.

Fully protonated B-type hexa­molybdoplatinate [H₆PtMo₆O₂₄]²⁻ and its adduct formation with [Pt(OH)₆]²⁻

The [H₆PtMo₆O₂₄]²⁻ anion, whose all six triply bridging O atoms are protonated, was structually characterized. The hexa­protonated anions bind to free platinate anions through strong hydrogen bonds to form a linear polymer in the crystal.

Poly[bis­(tri­methyl­ammonium) [hexa-μ-cyanido-cadmium(II)dicopper(I)]]

The title compound, which shows intense luminescence, consists of the three-dimensional coordination polymer [Cd^IICu^I₂(CN)₆]_n²⁻ and (CH₃)₃NH⁺ ions.

trans-Chlorido­tetra­kis­(4-methyl­pyridine-κN)(nitrosyl-κN)ruthenium(II) bis­(hexa­fluorido­phosphate) acetone 0.75-solvate

The title compound comprises four ligands of 4-picoline in equatorial position around the central atom. Overall, the complex features an octa­hedral geometry around the Ru centre, with the chloro ligand trans to the nitrosyl.

{(Hydrogen 2,2′,2′′-boranetri­yl)tris­[6-tert-butyl-4-methyl­pyridazine-3(2H)-thione]-κ³H,S,S′}(tri­phenyl­phosphane-κP)copper(I) chloro­form disolvate

The metal complex is composed of a central copper(I) atom, distorted tetra­hedrally coordinated by two of the three pyridazine-3-thione rings and the H atom of the scorpionate ligand and a tri­phenyl­phosphane ligand.

Naphthalene-1-carbaldehyde oxime

The title compound crystallizes with two mol­ecules, A and B, in the asymmetric unit, which are linked into infinite chains along [100] by alternating O—H⋯N (A → B) and O—H⋯O (B → A) hydrogen bonds.

(2E)-2-[4-(Di­methyl­amino)­benzyl­idene]-5-methyl­cyclo­hexa­none

The cyclo­hexa­none ring in the title compound adopts a half-chair conformation.

5-Acetyl-3-amino-4-(4-meth­oxy­phen­yl)-6-methyl­thieno[2,3-b]pyridine-2-carbo­nitrile

The asymmetric unit of the title compound comprises two independent mol­ecules, which differ primarily in the orientations of the acetyl and p-anisyl substituents. In the crystal, N—H⋯O hydrogen bonds form chains extending parallel to (110).

(E)-1-[5-Methyl-1-(p-tol­yl)-1H-1,2,3-triazol-4-yl]-3-{3-[5-methyl-1-(p-tol­yl)-1H-1,2,3-triazol-4-yl]-1-phenyl-1H-pyrazol-4-yl}prop-2-en-1-one

The title compound was synthesized from the reaction of an equimolar mixture of 1-[5-methyl-1-(p-tol­yl)-1H-1,2,3-triazol-4-yl]ethanone and 3-[5-methyl-1-(p-tol­yl)-1H-1,2,3-triazol-4-yl]-1-phenyl-1H-pyrazole-4-carbaldehyde in alcoholic sodium hydroxide.

4,4′,4′′,4′′′-({4′λ⁵,6λ⁵,6′λ⁵-Spiro­[dibenzo[d,f][1,3,2]dioxaphosphepine-6,2′-[1,3,5,2,4,6]tri­aza­triphosphinine]-4′,4′,6′,6′-tetra­yl}tetra­kis­(­oxy))tetra­benzaldehyde

The complete mol­ecule of the title cyclo­triphosphazene derivative is generated by crystallographic twofold symmetry.

(E)-2-{[(4-Anilinophen­yl)imino]­meth­yl}-4-bromo-5-fluoro­phenol

The dihedral angles between the central benzene ring and the pendant tris­ubstituted ring and phenyl group are 25.7 (2) and 51.7 (2)°, respectively. The mol­ecular conformation is influenced by an intra­molecular O—H⋯N hydrogen bond. In the crystal, N—H⋯O hydrogen bonds link mol­ecules into C(11) chains propagating in [100]

(E)-4-Bromo-5-meth­oxy-2-{[(2-meth­oxy­phen­yl)imino]­meth­yl}phenol monohydrate

In this Schiff base hydrate, the dihedral angle between the benzene rings is 0.9 (2)° and an intra­molecular O—H⋯N hydrogen bond closes an S(6) ring. In the crystal, O_w—H⋯O (w = water) hydrogen bonds link the components into centrosymmetric tetra­mers (two Schiff bases and two water mol­ecules).

(E)-3-[4-(Benzo[d]oxazol-2-yl)styr­yl]-1-methyl­pyridin-1-ium hexa­fluorido­phosphate

In the crystal, the hexa­fluorido­phosphate anion accepts a weak C—H⋯F hydrogen bond from the (E)-3-[4-(benzo[d]oxazol-2-yl)styr­yl]-1-methyl­pyridin-1-ium cation to form an ion-pair.

(E)-3-[4-(Benzo[d]oxazol-2-yl)styr­yl]-1-methyl­pyridin-1-ium tri­fluoro­acetate

The cation in the title salt is approximately planar. In the crystal, the components are linked by weak C—H⋯O hydrogen bonds, C—F⋯π inter­actions and aromatic π–π stacking inter­actions.

1,4-Bis(4-methyl-2-nitro­phen­oxy)butane

The title mol­ecule crystallizes with the mid-point of the central C—C bond being located on a crystallographic inversion centre. In the crystal, weak C—H⋯O inter­actions generate a layered structure.

2-{(E)-[(3-Chloro-4-methyl­phen­yl)imino]­meth­yl}-4-(tri­fluoro­meth­oxy)phenol

The dihedral angle between the planes of the benzene rings is 8.3 (2)° and an intra­molecular O—H⋯N hydrogen bond closes an S(6) ring. In the crystal, weak C—H⋯O links connect the mol­ecules into [10] chains.

3,3′-[(2-Bromo-1,3-phenyl­ene)bis­(methyl­ene)]bis­(1-butyl-2,3-di­hydro-1H-imidazole-2-selone)

In the structure of the bis­(selone) 3,3′-[(2-bromo-1,3-phenyl­ene)bis­(methyl­ene)]bis­(1-butyl-2,3-di­hydro-1H-imidazole-2-selone), the two Se atoms are directed in opposite directions with respect to the central benzene ring.

Ethyl 2-[(3-methyl­quinoxalin-2-yl)sulfan­yl]acetate

The structure of the title quinoxaline derivative is reported. The crystal structure features C—H⋯N and C—H⋯O hydrogen bonds together with offset π–π-stacking inter­actions.

4-Methyl­anilinium tri­chloro­acetate

The asymmetric unit of the title mol­ecular salt contains two cations and two anions. In the crystal, N—H⋯O hydrogen bonds link the components into [100] chains incorporating (10) loops and weak π–π stacking is also observed.

1-[5-Methyl-1-(4-methyl­phen­yl)-1H-1,2,3-triazol-4-yl]ethanone

In the title triazole derivative, the p-tolyl ring is twisted away from the mean plane (r.m.s. deviation = 0.044 Å) of the rest of the mol­ecule by 50.84 (6)°.

5-Acetyl-6-methyl-4-phenyl-1-(prop-2-yn­yl)-3,4-di­hydro­pyrimidin-2(1H)-one

Di­hydro­pyrimidino­nes constitutes an important organic precursor for a number of mol­ecules with biological activities. The 4-di­hydro­pyrimidin-2(1H)-one moiety displays a half-chair conformation and is almost perpendicular to the aromatic ring and to the prop-2-ynyl chain. An intra­molecular C—H⋯O hydrogen bond forms an S(6) ring motif. In the crystal, mol­ecules are linked by pairs of N—H⋯O hydrogen bonds, forming inversion dimers.

5,5-Di­phenyl-3-propyl­imidazolidine-2,4-dione

The two independent mol­ecules in the asymmetric unit differ in the orientation of the propyl and phenyl substituents and are associated through a C—H⋯π(ring) inter­action. Further sets of C—H⋯π(ring) inter­actions form sheets parallel to (011), which are connected by sets of inversion-related N—H⋯O hydrogen bonds.

Methyl 5-(1-benzo­furan-2-yl)isoxazole-3-carboxyl­ate

The title compound is almost planar. In the crystal, weak C—H⋯O and C—H⋯N inter­actions connect the mol­ecules into ribbons propagating parallel to the a-axis direction.