R. Corzo-suarez et al., Bis(1-methylguanidinium) tetrachloro-cuprate(II) and 4-(2-pyrimidin-1-io)piperazinium tetrachlorocuprate(II), ACT CRYST C, 56, 2000, pp. E385-E387
The crystal structures of the title compounds, (C2N3H8)(2)-[CuCl4], (I), an
d (C8H14N4)[CuCl4],(II), have been studied by X-ray diffraction. The struct
ures consist of discrete [CuCl4](2-) anions with two monoprotonated (C2N3H8
)(+) cations for (I) and a diprotonated (C8N4H14)(2+) cation for (II). The
[CuCl4](2-) anions of both compounds have flattened tetrahedral geometries.
There are several N-H ... Cl weak bonds that join the [CuCl4](2-) anions a
nd the organic cations helping retain the pseudo-tetrahedral geometries of
the anions.