research papers
Natural dendocarbin A is a sesquiterpene lactone isolated from Drimys winteri. X-ray crystal structure analysis confirmed the S/R character of the chiral centres at C-5/C-10 and C-9/C-11, respectively. The α-OH group at C-11 was found to be involved in intermolecular hydrogen bonding, defining chains along the <100> 21 screw axis.
research papers
In the crystal structure of the natural compound hobartine, a tetracyclic alkaloid isolated from Aristotelia chilensis, the supramolecular structure in strongly related to the twofold screw axis, around which isolated chains build up, internally linked by an N—HN hydrogen bond which is the only significant intermolecular interaction present in the structure.
research papers
In a two-dimensional cobalt(II) coordination polymer of benzene-1,2-dicarboxylate and 4,4′-bipyridine, interplanar cohesion is achieved via oligomeric solvent water clusters.
research papers
Two new NiII complexes are presented, i.e. a one-dimensional polymeric complex incorporating homophthalate, where the anion acts as the bridging ligand, and a complex incorporating benzene-1,2,4,5-tetracarboxylate, with two independent Ni centres in different environments, one of them a centrosymmetric 4- dinuclear complex and the other a 2+ mononuclear unit, appearing in a 1:2 ratio. The supramolecular structure is supported by a profuse hydrogen-bonding network.
research papers
In an ethanol-solvated centrosymmetric dimer of bismuth(III) and thiosaccharinate, the Bi3+ cation is coordinated by three thiosaccharinate ligands, all of them acting as bidentate chelates through the N and exocyclic S atoms (in a 2N,S mode). Centrosymmetric dimers result from the association of molecules via - interactions.
research papers
The title substituted pyrazolone compounds, one of them presenting two molecules in the asymmetric unit, differ in the substituents on two terminal benzene rings. The three-dimensional supramolecular structure is achieved in both cases via a number of C-HO, C-H and - weak interactions, linking the molecules into more or less compact supramolecular structures.
research papers
{[Co(pht)(bpy)(H2O)2]·2H2O}n (P2/n) single crystals (where pht is phthalate and bpy is 4,4'-bipyridine) dehydrate in a topotactic fashion into an anhydrate formulated as [Co(pht)(bpy)(H2O)2]n, which organizes in the orthorhombic system (Pmn21) in a disordered fashion, where two mirror-related 0.50:0.50 occupancy two-dimensional planar substructures are mirrored in a plane perpendicular to [100]. These two-dimensional substructures are also present in the parent hydrate, and have been found in topologically related structures with different anions and cations.