Cationic, neutral and anionic metal(II) complexes derived from 4-oxo-4H-­pyran-2,6-dicarboxylic acid (chelidonic acid)

Yasodha, V.; Govindarajan, S.; Low, J.N.; Glidewell, C.

doi:10.1107/S010827010701459X

Acta Crystallographica Section C
Acta Crystallographica
Section C STRUCTURAL CHEMISTRY

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Figure 12
Part of the crystal structure of compound (IV)

, showing the formation of a chain of alternating cations and anions along [10 $[\overline{1}]$ ]. For the sake of clarity, the water molecules and H atoms bonded to C atoms have all been omitted. O atoms marked with an asterisk (*), a hash sign (#), a dollar sign ($) or an ampersand (&) are at the symmetry positions (−x, −y, 1 − z), (1 − x, −y, −z), (1 + x, y, −1 + z) and (−1 + x, y, 1 + z), respectively. Atoms Cu1# and Cu1& are at (1, 0, − $[{1 \over 2}]$ ) and (−1, 0, $[{3 \over 2}]$ ), respectively, and atoms Cu2* and Cu2$ are at (− $[{1 \over 2}]$ , 0, 1) and ( $[{3 \over 2}]$ , 0, −1), respectively.

STRUCTURAL
CHEMISTRY

ISSN: 2053-2296

Volume 63| Part 5| April 2007| Pages m207-m215

doi:10.1107/S010827010701459X

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