IUCrData launches Raw Data Letters

A new category of articles – Raw Data Letters – is introduced to IUCrData.

Crystal structure of the second extracellular domain of human tetraspanin CD9: twinning and diffuse scattering

Remarkable features are reported in the diffraction pattern produced by a crystal of tetraspanin CD9_EC2.

μ-Oxido-bis­[(5,10,15,20-tetra­phenyl­porphyrinato-κ⁴N,N′,N′′,N′′′)manganese(III)]

The oxido-bridged dinuclear complex, [Mn(TPP)]₂O, has an Mn—O distance of 1.7600 (3) Å, an Mn—O—Mn bridging angle of 176.1 (2)°, and exhibits point group symmetry 2.

1-Methyl-5-nitro­imidazolium chloride

A combination of hydrogen-bonding and anion-π inter­actions help form the extended structure of the title salt.

Ethidium hepta­fluoro­butyrate

The crystal structure of the title ethidium salt has been determined. The ethidium cations construct a dimerized structure due to π–π inter­actions.

2,2′-{(1E,1′E)-[Ethane-1,2-diylbis(aza­nylyl­idene)]bis­(methanylyl­idene)}bis­(4-iodo­phenol)

The title compound is an di­iodo Schiff base mol­ecule under investigation for possible anti­microbial activity as well as for a ligand for medicinal activity.

3-(2,3-Di­meth­oxy­phen­yl)-2,3-di­hydro-1H-benzo[f]chromen-1-one

The crystal structure of a flavanone is reported in which C—H⋯O hydrogen bonds link the mol­ecules into chains.

Iso­propyl 4-amino­benzoate

The title compound crystallizes with two mol­ecules in the asymmetric unit, which form double chains in the crystal linked by N—H⋯O and N—H⋯N hydrogen bonds.

3-Methyl-5-(4-methyl­phen­oxy)-1-phenyl-1H-pyrazole-4-carbaldehyde

In the title compound, the phenyl and pyrazole rings subtend a dihedral angle of 22.68 (8)°.

Bis(4-hy­droxy­phen­yl) 1,4-phenyl­enebiscarbamate

The crystal structure of the title compound features a three-dimensional framework resulting from hydrogen bonds formed by the hy­droxy and urethane groups.

(E)-1-(2-Hy­droxy-4,6-di­meth­oxy­phen­yl)-3-(naph­thalen-1-yl)prop-2-en-1-one

The crystal structure of a chalcone is reported. The relative conformation of the C=C and C=O double bonds in the central enone group is s-cisoid; there is a trans configuration about the C=C bond. In the crystal, C—H⋯O inter­actions link mol­ecules into linear chains along the a-axis direction.

10-[(4-Nitro­phen­yl)ethyn­yl]-10H-pheno­thia­zine

In the title pheno­thia­zine derivative, the heterocycle displays a butterfly conformation.