Synchrotron powder X-ray diffraction of a refractory high entropy alloy, Mo_0.20Nb_0.21Ta_0.19V_0.20W_0.20

The refractory high-entropy alloy Mo_0.20Nb_0.21Ta_0.19V_0.20W_0.20 crystallizes in a tungsten-type structure with all elements located on a single crystallographic site.

Bis(4-amino-3,5-di­chloro­pyridinium) tetra­chloridomercurate(II)

In the complex anion of the title salt, the Hg²⁺ ion is coordinated by four Cl⁻ ligands, forming a distorted tetra­hedral geometry. In the extended structure, the cations and anions are linked via N—H⋯Cl and C—H⋯Cl hydrogen bonds.

(3E)-1,1,1-Tri­chloro-4-meth­oxy-4-phenyl­but-3-en-2-one

The crystal structure and Hirshfeld analysis of the title compound is reported. The E isomer of the central alkene entity was unequivocally determined, in which weak intra­molecular inter­actions between the ketone and the phenyl groups are suggested. In addition, the mol­ecules are connected by weak inter­molecular Cl⋯O inter­actions along [100].

(4aR*,10bR*)-8,10-Dimeth­oxy-5-[(4-nitro­phen­yl)sulfon­yl]-3,4,4a,5,6,10b-hexa­hydro­phenanthridine

The title compound, C₂₁H₂₂N₂O₆S, which was obtained during a study directed to the synthesis of the anti-cancer natural product, pancratistatin, crystallizes with two independent mol­ecules in the asymmetric unit with similar but not identical shapes. The crystal structure confirms the expected mol­ecular structure of the compound.

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

In the title compound, the dihedral angles between the central isoxazole ring and the 4-fluoro­phenyl and pyridine rings are 37.51 (10) and 12.11 (15)°, respectively.

(3Z)-Tri­cyclo­[6.3.3.0^1,8]tetra­dec-3-ene-10,13-dione

The title compound features a diquinane being annulated to a cyclo­octene in twist-boat-chair conformation. In the crystal, hydrogen bonds connect the mol­ecules into centrosymmetric dimers, which are further connected into chains.

2-Methyl-N-[(E)-4-nitro­ben­zyl­idene]pro­pan-2-am­ine

In this Schiff base derived from tert-butyl­amine and para-nitro­benzaldehyde, C—H⋯O contacts connect the mol­ecules into chains along the b-axis direction.

1-[(E)-1-(2-Carb­oxy-6-methyl­phen­yl)diazen-1-ium-2-yl]naphthalen-2-olate

The title compound crystallizes with two zwitterionic mol­ecules (A and B) in the asymmetric unit, each featuring an intra­molecular N—H⋯O hydrogen bond. In the extended structure, A + A and B + B carb­oxy­lic-acid inversion dimers linked by pairwise O—H⋯O hydrogen bonds arise, which generate R²₂(8) loops in each case. The dimers are linked by weak C—H⋯π and π–π stacking inter­actions.

Ethyl 2-cyano-2-(1,3-dithiepan-2-yl­idene)acetate

In the title compound, the seven-membered 1,3-dithiepane ring adopts a distorted chair conformation. In the extended structure, inversion dimers linked by pairwise C—H⋯O hydrogen bonds generate R₂²(14) loops.