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Figure 2
(a) The observed and (b) the unobserved possible hydrogen-bonding geometry in the hydrogen bis­(oxamate) anion. The different `conformations' of the oxamate groups are labelled A (with carbonyl O atoms in a cis geometry) and B (with carbonyl O atoms in a trans geometry). (c) The planar oxamate anion and the relative basicity of the carboxyl­ate O atoms, as inferred from this study.

Journal logoSTRUCTURAL
CHEMISTRY
ISSN: 2053-2296
Volume 66| Part 3| February 2010| Pages o147-o150
doi:10.1107/S0108270110004233
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