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- W2006453080 abstract "The title coordination polymer, poly[(μ4-2-oxidoisophthalato-κ6O1,O2:O2,O3:O3′:O3′)(μ2-quinoxaline-κ2N:N′)copper(I)copper(II)], [Cu2(C8H3O5)(C8H6N2)]n, contains two crystallographically distinct Cu ions, one quinoxaline (QA) unit and one 2-oxidoisophthalate trianion (L) derived from 2-hydroxyisophthalic acid (H3L). The CuII ion is strongly coordinated by four O atoms in a distorted square geometry, of which two belong to two phenoxide groups and the other two to carboxylate groups of two L ligands. In addition, the CuII cation interacts weakly with a symmetry-related carboxylate O atom which belongs to the L ligand in an adjacent layer, giving a square-pyramidal coordination geometry. The CuI ion is trigonally coordinated by two N atoms from two QA molecules and one O atom from an L carboxylate group. The CuI centres are bridged by QA ligands to give a chain along the c axis. Two CuII ions and two L ligands form a [Cu2L2]2− `metallo-ligand', which coordinates two CuI ions. Thus, the chains of CuI and QA are linked by the [Cu2L2]2− metallo-ligand to yield a two-dimensional (6,3) sheet. These sheets are further linked by symmetry-related carboxylate O atoms of neighbouring layers into a three-dimensional framework. The in situ reaction from benzene-1,2,3-tricarboxylic acid (H3L1) to L in the present system has rarely been observed before, although a few novel in situ reactions, such as ligand oxidative coupling, hydrolysis and substitution, have been observed during the hydrothermal process." @default.
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- W2006453080 date "2008-09-20" @default.
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- W2006453080 title "A mixed-valence copper coordination polymer generated by a hydrothermal metal/ligand redox reaction process" @default.
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- W2006453080 doi "https://doi.org/10.1107/s0108270108029314" @default.
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