metal-organic compounds
Open access
In the title heterodinuclear complex, [CuNa(BF4)(C8H7O3)2]n, the CuII ion is four-coordinated by four O atoms of two 2-formyl-6-methoxyphenolate ligands, giving rise to a square-planar geometry. The Na+ ion is six-coordinated by four O atoms from the two ligands and two F atoms of two tetrafluoridoborate anions. The tetrafluoridoborate anion links the Na+ ions, forming a one-dimensional structure along [001]. Three F atoms of the tetrafluoridoborate anion are disordered over two sets of sites, with an occupancy ratio of 0.790 (11):0.210 (11).
metal-organic compounds
Open access
In the title heterodinuclear complex, [CuNa(C8H7O3)2(ClO4)(CH3OH)]n, the CuII ion is five-coordinated by four O atoms from two 2-formyl-6-methoxyphenolate anions and one O atom from a perchlorate anion in a distorted square-pyramidal geometry. The Na+ ion is six-coordinated by four O atoms from two 2-formyl-6-methoxyphenolate ligands, one O atom of a methanol molecule and one O atom of a perchlorate anion. The perchlorate anions link the Na+ and CuII ions, forming a chain along [010]. O—HO hydrogen bonds connect the chains. π–π interactions are present between the benzene rings [centroid–centroid distances = 3.566 (2) and 3.702 (2) Å]. The O atoms of the perchlorate anion are disordered over two sets of sites, with an occupancy ratio of 0.481 (8):0.519 (8).
organic compounds
Open access
The title compound, C32H50O10, prepared from a mixture of α- and β-dihydroartemisinin, has two β-arteether moieties linked via an –OCH2CH2O– bridge, so that the molecule is symmetric about the bridge. Each asymmetric unit contains a β-arteether moiety and an –OCH2 group, which is only one-half of the molecule. The endo-peroxide bridges of the parent compounds have been retained in each half of the diol-bridged dimer. The rings exhibit chair and twist-boat conformations.