-Min Li

Tris(1,10-phenanthroline)cobalt(II) bis­(trichloro­acetate)

In the title complex, [Co(C12H8N2)3](C2Cl3O2)2, the CoII ion lies on a twofold rotation axis and is coordinated by six N atoms from three bis-chelating 1,10-phenanthroline ligands in a distorted octahedral environment. The crystal structure is stabilized by weak intermolecular C—H⋯O hydrogen bonds.

Bis(hexa­methyl­enetetra­mine)bis­(tri­chloro­acetato)copper(II)

In the title compound, [Cu(C2Cl3O2)2(C6H12N4)2], the CuII ion (site symmetry 2) is coordinated by two trichloroacetate anions and two hexamethylenetetramine molecules, resulting in a distorted CuN2O2 geometry that is intermediate between tetrahedral and square planar. The Cl atoms are disordered over two sets of sites, with relative occupancies of 0.749 (7) and 0.251 (7). In the crystal, the packing is consolidated by intermolecular C—H⋯O interactions.

Tetra-imidazole-bis(trichloro-acetato)copper(II).

The title compound, [Cu(C2Cl3O2)2(C3H4N2)4], was prepared by the reaction of imidazole and trichloroacetatocopper(II). The CuII atom adopts a distorted octahedral coordination geometry, binding the N atoms of four imidazole ligands and the carboxylate O atoms of two trichloroacetate anions. The molecular structure and packing are stabilized by N—H⋯O hydrogen-bonding interactions. Close intermolecular Cl⋯Cl contacts [3.498 (3) Å] are also found in the structure.

Tetra­pyridine­bis(trichloro­acetato)nickel(II)

The title compound, [Ni(C2Cl3O2)2(C5H5N)4], was prepared by the reaction of pyridine and trichloroacetatonickel(II) in ethanol solution at room temperature. The NiII atom is located on a twofold rotation axis and has a slightly distorted octahedral coordination made up of four N atoms of the pyridine ligands and two O atoms of trichloroacetate anions. The molecular structure and packing are stabilized by intra- and intermolecular C—H⋯O hydrogen-bonding interactions.

4-{[(5-Methyl-2-fur-yl)methyl-ene]hydrazinocarbon-yl}pyridinium chloride monohydrate.

The title compound, C12H12N3O2 +·Cl−·H2O, was prepared by the reaction of N′-[(5-methyl-2-furyl)methylene]isonicotinohydrazide and hydrochloric acid at room temperature. The entire molecule is approximately planar with a maximum deviation of 0.047 (2) Å. An intramolecular C—H⋯O interaction is observed. O—H⋯Cl, N—H⋯Cl, N—H⋯O, N—H⋯N, C—H⋯Cl and C—H⋯O hydrogen-bonds stabilize the crystal structure.

N′-(4-Bromo­benzyl­idene)isonicotino­hydrazide

The title compound, C13H10BrN3O, was prepared by the reaction of isonicotinohydrazide and 4-bromobenzaldehyde. The dihedral angle between the benzene and pyridine rings is 8.60 (12)°. The crystal packing is stabilized by intermolecular C—H⋯O and N—H⋯O hydogen-bonding interactions.

1‐Acetyl‐5‐(4‐chlorophenyl)‐3‐(4‐fluorophenyl)‐2‐pyrazoline

Pyrazoline and its derivatives are important and useful fivemembered heterocyclic compounds, which are found to possess antiviral (Rawal et al., 1963), antifungal (Dhal et al., 1975) and immunosuppressive activities (Lombardino & Ottemes, 1981). 1-Acetyl-3,5-diaryl-2-pyrazolines have been found to inhibit monoamine oxidases (Manna et al., 2002). As part of our ongoing investigation of pyrazolines and their metal complexes, we report here the crystal structure of the title compound, (I).