Tetra­aqua­bis­[4-(1H-imidazol-1-yl-κN³)benzoato]cobalt(II)

In the title compound, [Co(C₁₀H₇N₂O₂)₂(H₂O)₄], the Co^II atom lies on an inversion centre and displays a slightly distorted octa­hedral geometry. The coordination sphere is defined by two mutually trans N atoms from two 4-(imidazol-1-yl)benzoate ligands and the O atoms from four water mol­ecules. The crystal structure is stabilized by O—H...O hydrogen bonds.

catena-Poly[[[aqua­[3-(3-hy­droxy­phen­yl)prop-2-enoato]samarium(III)]-bis­[μ₂-3-(3-hy­droxy­phen­yl)prop-2-enoato]] monohydrate]

The title Sm^III compound, {[Sm(C₉H₇O₃)₃(H₂O)]·H₂O}_n, was obtained under hydrothermal conditions. Its structure is isotypic with the analogous Eu complex. The latter was reported incorrectly in space group P1 by Yan et al. [J. Mol. Struct. (2008), 891, 298–304]. This was corrected by Marsh [Acta Cryst. B65, 782–783] to P-1. The Sm^III ion is nine-coordinated by O atoms from one coordinating water molecule and the remaining ones from the 3-(3-hy­droxy­phen­yl)prop-2-enoatate anions (one bidentate, two bidentate and bridging, two monodentate bridging), leading to a distorted tricapped trigonal–prismatic coordination polyhedron surrounded by solvent water mol­ecules. In the crystal, extensive intermolecular O—H...O hydrogen-bonding inter­actions and π–π inter­actions [centroid–centroid separation = 3.9393 (1) Å] lead to the formation of a three-dimensional supra­molecular network.

Bis(tetra­butyl­ammonium) [2-(eth­oxy­carbony)phenyl­imido]-μ₆-oxido-dodeca-μ₂-oxido-penta­oxidohexa­molybdenum diethyl ether hemisolvate

In the title complex, [(C₄H₉)₄N]₂[Mo₆O₁₈(C₉H₉NO₂)]·0.5C₄H₁₀O, the aryl­imido ligand is linked to an Mo atom of the Lindqvist-type polyoxidometalate anion by an Mo[triple bond]N bond of 1.726 (4) Å. The Mo[triple bond]N—C angles are 160.7 (5) and 167.6(5)° because of disorder affecting the aryl group, and is typical for the imido monodentate behaviour described in analogous hybrids. Light components of the structure are extensively disordered. The aryl ester group is disordered over two positions with occupancies refined to 0.559 (3) and 0.441 (3). Both independent tetra­butyl­ammonium cations have butyl chains partially split over two sites, with occupancies as in the aryl group of the anion. Finally, the ether solvent mol­ecule is disordered around an inversion centre. In the crystal, cations and anions inter­act via C—H...O contacts, involving O atoms of the polyoxidometalate anion and the ester group of the aryl­imido ligand as acceptor groups.

Tetra­kis(μ-2-phenyl­quinoline-4-carboxyl­ato-κ²O:O′)bis­[(methanol-κO)copper(II)]

The title complex, [Cu₂(C₁₆H₁₀NO₂)₄(CH₃OH)₂], consists of centrosymmetric wheel-shaped dinuclear neutral mol­ecules in which each Cu^II atom is coordinated in a slightly distorted square-pyramidal geometry by four O atoms of carboxyl­ate groups from different ligands at the basal plane and an O atom of a methanol mol­ecule at the axial position. In the crystal, the dinuclear complex mol­ecules are linked into one-dimensional supra­molecular columns parallel to the b axis by O—H...N hydrogen bonds and π–π stacking inter­actions [centroid–centroid distance = 3.7259 (11) Å].

3′,6′-Bis(diethyl­amino)-2-[(E)-2-(4-hy­droxy-3-meth­oxy­benzyl­idene­amino)­eth­yl]spiro­[isoindoline-1,9′-xanthen]-3-one ethanol monosolvate

In the title compound, C₃₈H₄₂N₄O₄·C₂H₆O, prepared via a spiro­lactam ring-formation reaction in a rhodamine dye, the xanthene ring system is approximately planar (r.m.s. deviation = 0.0014Å) and subtends dihedral angles of 88.10 (3) and 86.92 (4)° with the spiro­lactam (r.m.s. deviations = 0.0012 Å) and benzene rings, respectively. The crystal structure consists of chains parallel to [-101], formed via O—H...O inter­actions.