Poly[(μ₆-2-methyl-3,5-dinitro­benzoato)potassium]

In the structure of the title coordination polymer, [K(C₈H₅N₂O₆)]_n, each ligand bridges six K⁺ cations. The carboxyl­ate group coordinates both bidentately to one K⁺ ion and monodentately to two K⁺ ions, while one nitro group coordinates bidentately to a fourth K⁺ ion. The last two K⁺ ions are coordinated by the remaining nitro group, one in a bidentate fashion, the other monodentately through one O atom. This bridging mode results in a three-dimensional network. The coordination geometry of the K⁺ ion is represented by an irregular KO₉ polyhedron. Very weak C—H...O inter­actions are observed in the crystal structure.

(E)-3-(3-Chloro­phen­yl)-1-(4-methoxy­phen­yl)prop-2-en-1-one

The title mol­ecule, C₁₆H₁₃ClO₂, is trans with respect to the C=C double bond. The dihedral angles between the mean plane of the prop-2-en-1-one unit and those of the 3-chloro- and 4-meth­oxy-substituted benzene rings are 20.93 (9) and 20.42 (10)°, respectively, and the dihedral angle between the mean planes of the two benzene rings is 40.96 (5)°. The crystal structure is stabilized by weak inter­molecular C—H...O hydrogen bonds, forming chains along the b axis.