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Figure 3
The double hydrogen bonds between atoms N3 and N5 of the biguanidium groups and the carboxyl­ate groups of the oxalate anion in (I[link]). [Symmetry codes: (A) x, [3 \over 2] − y, −[1 \over 2] + z; (B) 2 − x, y − [1 \over 2], [3 \over 2] − z; (C) x, [3 \over 2] − y, −[1 \over 2] + z; (E) 2 − x, 1 − y, 1 − z; (G) −1 + x, y, z; (H) −1 + x, [3 \over 2] − y, −[1 \over 2] + z; (I) 1 − x, −[1 \over 2] + y, [3 \over 2] − z; (J) 1 − x, 1 − y, 1 − z; (K) 1 − x, −[1 \over 2] + y, [1 \over 2] − z; (L) 1 + x, [1 \over 2] − y, [1 \over 2] + z.]

Journal logoSTRUCTURAL
CHEMISTRY
ISSN: 2053-2296
Volume 60| Part 10| September 2004| Pages o740-o743
doi:10.1107/S010827010401786X
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