N-[2-(N-Cyclo­hexyl­carbamo­yl)propan-2-yl]-N-(2-iodo­phen­yl)prop-2-ynamide

In the title compound, C₁₉H₂₃IN₂O₂, the cyclo­hexane ring adopts a chair conformation, and the mean plane of the propiolamide unit is approximately perpendicular to the benzene ring [dihedral angle = 88.12 (13)°]. Weak intra­molecular C—H...O hydrogen bonding is observed between the carbonyl group and the benzene ring. In the crystal, classical N—H...O hydrogen bonds and weak C—H...O inter­actions are present.

(2E,6E)-2,6-Bis(2,6-dichloro­benzyl­idene)­cyclo­hexa­none

The title compound, C₂₀H₁₄Cl₄O, was prepared by the reaction of 2,6-dichloro­benzaldehyde and cyclo­hexa­none. In the mol­ecule, the central cyclo­hexa­none ring adopts an envelope conformation, while the terminal benzene rings make a dihedral angle of 57.87 (9)°.

2,9-Dimethyl-1,10-phenanthrolin-1-ium tetra­chloridoferrate(III) methanol monosolvate

In the title compound, (C₁₄H₁₃N₂)[FeCl₄]·CH₃OH, the 2,9-dimethyl-1,10-phenanthrolin-1-ium cation, FeCl₄⁻ anion and methanol solvent mol­ecule lie on a twofold rotation axis. Due to symmetry, the H atom on the N atom of the cation is half-occupied. In the anion, the Fe^III atom has a tetra­hedral geometry. H atoms of the methanol mol­ecule are disordered over two sets of sites around the twofold axis. In the crystal, π–π contacts between the pyridine rings and between the pyridine and benzene rings [centroid–centroid distances = 3.6535 (16) and 3.5522 (17) Å] and inter­molecular O—H...N and N—H...O hydrogen bonds stabilize the structure.

Bis(ethyl­enediamine-κ²N,N′)bis­(methanol-κO)copper(II) benzene-1,4-dicarboxyl­ate methanol disolvate

In the cation of the title compound, [Cu(C₂H₈N₂)₂(CH₃OH)₂](C₈H₄O₄)·2CH₃OH, the Cu^II atom lies on an inversion centre. The four N atoms of two ethyl­enediamine ligands around the Cu^II atom form the equatorial plane, while two methanol O atoms in the axial positions complete a Jahn–Teller distorted octa­hedral coordination. The benzene-1,4-dicarboxyl­ate anion is centrosymmetric. In the crystal, C—H...O, N—H...O and O—H...O hydrogen bonds link the cations, the anions and the methanol solvent mol­ecules.

Tris(ethyl­enediamine-κ²N,N′)nickel(II) bis­(dimethyl phosphate)

In the title compound, [Ni(C₂H₈N₂)₃][O₂P(OCH₃)₂]₂, the Ni^II atom is six-coordinated in a distorted octa­hedral geometry by six N atoms from three ethyl­enediamine ligands. The P atoms of the anions adopt a distorted tetra­hedral geometry. In the crystal, inter­molecular N—H...O and C—H...O hydrogen bonds link the cations and anions into a three-dimensional network.