5-(3,4-Dimeth­oxy­benzyl­idene)-1,3-dimethyl-1,3-diazinane-2,4,6-trione

In the title compound, C₁₅H₁₆N₂O₅, the dihedral angle between 1,3-diazinane and benzene rings is only 4.27 (1)°. The essentially planar mol­ecular structure is characterized by a short intra­molecular C—H...O separation and by an exceptionally large bond angle of 138.25 (14)° at the bridging methine C atom. The meth­oxy groups deviate somewhat from the plane of the benzene ring, with C—C—O—C torsion angles of −15.6 (1) and 9.17 (6)°. In the crystal, mol­ecules form centrosymmetric dimers via donor–acceptor π–π inter­actions, with a centroid–centroid distance of 3.401 (1) Å.

μ-(2,2′-Bipyrimidine)-bis­[dichlorido­palladium(II)] dimethyl­formamide monosolvate

In the title compound, [Pd₂Cl₄(C₈H₆N₄)]·C₃H₇NO, the two Pd²⁺ cations have a distorted square-planar coordination sphere and are bridged by a bis-bidentate 2,2′-bipyrimidine ligand. Two terminal chloride anions are also bonded to each of the Pd²⁺ cations. The dinuclear complex and the dimethylformamide solvate molecule lie on the inter­section of a twofold rotation axis and a mirror plane, with disorder present in the solvate mol­ecule. There is a slight distortion from the square-planar metal geometry, as indicated by the bite angles of 81.77 (13)° and 91.63 (5)°. The C and O atoms of the solvent mol­ecule are disordered over two sets of sites of equal occupancy.

1-(3-Benzyl-4,6-dibenz­yloxy-2-hy­droxy­phen­yl)ethanone

The title compound, C₂₉H₂₆O₄, is essentially planar in the acetophenone portion that includes both the hy­droxy and a benz­yloxy O atoms, with an r.m.s. deviation of 0.0311 Å. The other two substituents inter­sect the plane at 70.45 (3) and 59.55 (4)°. In the molecule there is an intramolecular O—H...O hydrogen bond. In the crystal, mol­ecules are linked by C—H...O hydrogen bonds, as well as C—H...π and π-stacking inter­actions, with centroid–centroid distances 3.6570 (2) Å.

4-(2-Bromo­phen­yl)-2-phenyl­pyrano[3,2-c]chromen-5(4H)-one

In the title compound, C₂₄H₁₅BrO₃, the pyran­ochromenone ring is essentially planar, while the 2-bromo­phenyl group is almost perpendicular to it [85.58 (6)°]. In the crystal, inversion dimers linked by pairs of weak C—H...π bonds occur; there is also a short inter­atomic contact found between the Br and carbonyl O atoms [3.016 (1) Å].

2,5-Dihexyl­thio­phene 1,1-dioxide

In the title mol­ecule, C₁₆H₂₈O₂S, the two n-hexyl groups are in all-trans conformations. Their C atoms are situated close to the plane of the thio­phene ring with a maximum deviation of 0.718 (6) Å for one of the terminal methyl groups. In the crystal, a short C—H...O contact is observed between thio­phene 1,1-dioxide groups.