Aqua­[2,2′-(propane-1,3-di­yl)bis­(5-car­boxy-1H-imidazole-4-carboxyl­ato)-κ⁴N³,O⁴:N^3′,O^4′](pyridine-κN)cobalt(II)–4,4′-bipyridine (1/1)

In the title compound, [Co(C₁₃H₁₀N₄O₈)(C₅H₅N)(H₂O)]·C₁₀H₈N₂, the asymmetric unit comprises half a Co^II complex located on a mirror plane and half a cocrystallized mol­ecule of 4,4′-bipyridine located on an inversion center. The Co^II ion is six coordinate, with distorted octa­hedral geometry, ligated by two N atoms and two O atoms from a 2,2′-(propane-1,3-di­yl)bis­(5-carboxy-1H-imidazole-4-carboxyl­ate) dianion, one N atom from a pyridine mol­ecule and one coordinating water mol­ecule. The Co—O bond lengths range from 2.076 (2) to 2.1441 (15) Å, while the Co—N bond lengths are 2.138 (3) and 2.1515 (17) Å. A two-dimensional network of N—H...O and O—H...N hydrogen bonds stabilizes the crystal packing. There are π–π inter­actions between the bipyridine and imidazole rings [centroid–centroid distance = 3.7694 (4) Å]. The propane-1,3-diyl group is disordered over two conformations, with refined occupancies of 0.755 (8) and 0.245 (8).

Diaquadi-μ-formato-bis­{μ-2,2′-[propane-1,3-diylbis(nitrilo­methanylyl­idene)]diphenolato}cadmium(II)dinickel(II) dihydrate

In the centrosymmetric title compound, [CdNi₂(C₁₇H₁₆N₂O₂)₂(HCOO)₂(H₂O)₂]·2H₂O, The Ni^II cation is chelated by a 2,2′-[propane-1,3-diylbis(nitrilo­methanylyl­idene)]diphen­olate (salpn) anion, and further coordinated by a formate anion and a water mol­ecule in a distorted NiN₂O₄ octa­hedral geometry. The Cd^II cation, located on an inversion center, is coordinated by four deprotonated hy­droxy groups from two salpn anions and two carboxyl­ate O atoms from formate anions in a distorted octa­hedral geometry. Both formate and salpn anions bridge the Cd and Ni cations, forming a trinuclear complex. Within the salpn anion, the benzene rings are twisted to each other at a dihedral angle of 61.46 (18)°. Inter­molecular O—H...O hydrogen bonding is present in the crystal structure. The lattice water mol­ecule is disorder over two positions with an occupancy ratio of 0.75:0.25.

Trehalose dihydrate from Tremella fuciformis

The title compound, C₁₂H₂₂O₁₁·2H₂O {systematic name: 6,6′-oxybis[2-(hy­droxy­meth­yl)-3,4,5,6-tetra­hydro-2H-pyran-3,4,5-triol] dihydrate}, is a disaccharide, which was isolated from Tremella fuciformis. The mol­ecule contains two six-membered rings, both of which adopt a chair conformation. Extensive O—H...O hydrogen bonds occur in the crystal structure.

(4-Meth­oxy­phen­yl)(4-methyl­cyclo­hex­yl)methanone

The title compound, C₁₅H₂₀O₂, crystallizes with two independent mol­ecules of similar geometry in the asymmetric unit. The cyclo­hexyl ring adopts a chair conformation in each mol­ecule. In the crystal, mol­ecules related by translation are linked into chains along the a axis via weak C—H...O inter­actions.