trans-Bis(2-aminoanilinium-κN²)bis(oxalato-κ²O,O′)copper(II)

Abstract

Key indicatorsSingle-crystal X-ray study T = 120 K Mean '(C±C) = 0.003 A Ê R factor = 0.035 wR factor = 0.091 Data-to-parameter ratio = 14.2For details of how these key indicators were automatically derived from the article, see

Decomposition of allantoin in the presence of Cu(II) ions resulting in the formation of a coordination polymer containing oxalate species

“…Therefore, the point group symmetry of the C 2 O 2À 4 is closed to C 2h . The C-O and C-C distances, 1.241(4) Å, 1.257(4) Å and 1.551(6) Å, are comparable with the respective values of the non-coordinated C 2 O 2À 4 anion, 1.2534(17) Å 1.5740(24) Å, and to those observed in other oxalato-bridged copper(II) complexes [11][12][13][14][15][16][17].Two symmetry dependent DMSO molecules are coordinated monodentatly through the oxygen atom. The interatomic distances and angles are in good agreement with the data for coordinated 1387-7003/$ -see front matter Ó…”

1,4-Diazoniabicyclo[2.2.2]octane aquabis(oxalato-κ2O,O′)copper(II) dihydrate

“…As described previously (Keene et al, 2003(Keene et al, , 2004, discrete mono-and dinuclear metal oxalate species may be formed when the bridging potential of the oxalate is reduced. This can be achieved either through the use of capping ligands or by a high concentration of the oxalate dianion, in both cases resulting in coordinatively saturated complexes.…”

Hydrogen-bonding chain and dimer motifs in pyridinium and morpholinium hydrogen oxalate salts

“…While this structure is the most energetically favourable, the difference in energy between the 90 and 0 torsion angles is slight and is often overridden in hydrogen-bonded structures. Ammonium hydrogen oxalate salts are often useful precursors in the formation of transition metal complexes (Keene et al, 2003) and coordination polymers (Keene et al, 2004). Our research group has an interest in these precursors as part of our investigations into molecular magnets (Keene, et al 2010), not only for their usefulness in this role, but for the complex hydrogen-bonded structures that often arise on crystallization.…”