Aqua­bis­[N′-(1,3-dithio­lan-2-ylidene)-2-hy­droxy­benzohydrazidato(0.5−)-κ2 N′,O]sodium(I)

The title compound, [Na(C10H9.5N2O2S2)2(H2O)], is a mol­ecular sodium complex with N′-(1,3-dithio­lan-2-yl)-2-hy­droxy­benzohydrazide ligands with the negative charge spread evenly over both, and a water mol­ecule. The NaI ion coordination is distorted trigonal–bipyramidal, formed by two N and three O atoms, with the NaI ion lying on a twofold rotation axis. Intra­molecular N—H⋯O hydrogen bonds occur. Mol­ecules pack as discrete units and the crystal packing is stabilized by strong O—H⋯O hydrogen bonds, which give rise to chains along [010]; the chains are inter­linked by strong O—H⋯O hydrogen bonds

Bis(acetylacetonato-κ2O,O′)bis(pyridine-κN)nickel(II) dihydrate

The title compound, [Ni(C5H7O2)2(C5H5N)2]·2H2O, crystallizes with two half-molecules in the asymmetric unit. The NiII ion of each unique complex molecule lies on an inversion centre and has an octahedral coordination geometry. The crystal structure features weak O—H...O hydrogen bonds, which form chains running parallel to the a axis

N,N,N′,N′-Tetramethylphthalamide

The title compound, C12H16N2O2, crystallized from toluene with two independent molecules in the asymmetric unit. The dihedral angles between the amide groups and the benzene ring are 60.87 (11) and 54.08 (11)° in one independent molecule and 60.13 (11) and 64.64 (11) in the other. The crystal structure features weak C—H...O hydrogen bonds and C—H...π interactions

A new polymorph of aquabis(1,10-phenanthroline-κ2N,N′)copper(II) dinitrate

The title molecule, [Cu(C12H8N2)2(H2O)](NO3)2, is a new polymorph of a compound which up to now has been reported to crystallize space groups in C2/c and Cc. The crystal studied was twinned by non-merohedry (final BASF factor of 0.40043) with the structure being solved and refined in P-1. The CuII atom is coordinated by four N atoms from two 1,10-phenanthroline ligands and an O atom from a water molecule in an approximate trigonal–bipyramidal geometry. Discrete entities of one cation and two nitrate anions are formed by water–nitrate O—H...O hydrogen bonds. The components are further assembled into a three-dimensional network by C—H...O hydrogen bonds

(E)-1-[2-(3,4-Dimethylphenyl)diazen-2-ium-1-yl]naphthalen-2-olate

The title zwitterion, C18H16N2O, features an intramolecular N—H...O hydrogen bond. The dimethylbenzene ring is rotationally disordered about the N—C bond over two adjacent orientations in a 0.75:0.25 ratio. The dihedral angle between the major orientation of the benzene ring and the naphthalene ring system is 6.06 (2)°. In the crystal, aromatic π–π stacking occurs [shortest centroid–centroid distance = 3.574 (3) Å] and C—H...O interactions are also observed

Bis(2,2′-bipyridyl-κ2N,N′)chloridonickel(II) nitrate trihydrate

In the title hydrated salt, [NiCl(C10H8N2)2](NO3)·3H2O, the Ni2+ ion is coordinated by two 2,2′-bipyridyl (2,2′-bpy) ligands and a chloride ion in a trigonal–bipyramidal geometry. The chloride ion occupies an equatorial site and the dihedral angle between the 2,2′-bpy ring systems is 72.02 (6)°. In the crystal, the components are linked by C—H...O and O—H...O hydrogen bonds and aromatic π–π stacking interactions [shortest centroid–centroid separation = 3.635 (2) Å], generating a three-dimensional network