Tri­carbonyl­(η⁶-N,N-di­methyl­aniline)­chromium(0)

The title compound, [Cr{(C₆H₅N(CH₃)₂}(CO)₃], exhibits the three-legged piano-stool structure expected for a tri­carbonyl­metal with an η⁶-coordinated arene. The arene moiety is distorted with the amino functional group bent away from the chromium atom.

2,3-Bis(5-bromo-2-thien­yl)-6,7-dichloro­quinoxaline

The title compound, C₁₆H₆Br₂Cl₂N₂S₂, was synthesized from the reaction of equimolar amounts of 1,2-diamino-4,5-dichloro­benzene and 1,2-bis­(5-bromo­thien-2­yl)ethanedione. The crystal structure was determined at 100 K.

5-Nitro­thio­phene-2-carb­aldehyde

In the crystal structure of the title compound, C₅H₃NO₃S, determined at 100 K, the nitro group and the aldehyde group make angles of 8.37 (16) and 8.5 (4)°, respectively, with the plane of the thio­phene ring.

N,N'-Bis(9H-fluoren-9-yl­idene)benzene-1,2-diamine

The title compound, C₃₂H₂₀N₂, was synthesized by the p-toluene­sulfonic acid-assisted Schiff base reaction between 9-fluorenone and o-phenyl­enediamine. The mol­ecule crystallizes in a centrosymmetric space group and is located on a twofold rotation axis. The two fluoren-9-yl­idene moieties adopt a trans configuration as substituents on the linking benzene ring, making the entire mol­ecule chiral.

Bis(acetyl­acetonato-κ²O,O′)(N,N-dimethyl­amino­ethanol-κ²N,O)zinc(II)

The title crystalline complex, [Zn(C₅H₇O₂)₂(C₄H₁₁NO)], was prepared as a result of our efforts to synthesize ZnO precursors for chemical vapor deposition. Two acetyl­acetonate and one N,N-dimethyl­amino­ethanol ligands are coordinated to the Zn^II atom in a slightly distorted octa­hedral environment.

Redetermination of bis­(2,4-pentane­dionato)­palladium(II)

The crystal structure of the title compound, [Pd(C₅H₇O₂)₂], has been redetermined at 100 K using modern equipment, resulting in improved precision compared to the previous study [Knyazeva et al. (1970). Zh. Strukt. Khim. 11, 938-939]. The new measurements reveal that the plane of the 2,4-penta­nedionate ligand is tilted by 3.4 (1)° with respect to the PdO₄ unit (Pd site symmetry = ). Possible reasons for this bending are examined in terms of previously undiscussed inter­molecular inter­actions.

Bis(benzyl­sulfan­yl)maleonitrile

The title compound, C₁₈H₁₄N₂S₂, crystallizes as a pseudo-merohedral twin, with four independent mol­ecules in the asymmetric unit. The compound shows a combination of π-inter­actions and close-packing, with the planar maleonitrile and phenyl groups extending into pockets of neighbouring mol­ecules.

2,5-Bis(2,2-diphenyl­ethen­yl)thio­phene

The ethene units of the title compound, C₃₂H₂₄S, a possible candidate for Organic Light-Emitting Devices, are tilted with respect to the thio­phene unit by 6.2 (1) and 9.2 (1)°.