Abstract

The asymmetric unit of the title compound, (C6H9N2)2[CuCl4], consists of one cation and one half-anion, bis­ected by a twofold rotation axis through the metal center. The anion exhibits a geometry that is inter­mediate between a Td and D 4h arrangement about the Cu atom. The crystal structure contains chains of cations alternating with stacks of anions. The cationic groups inter­act via offset face-to-face π–π stacking, forming chains running along the c axis. The anion stacks are parallel to the cation chains, with no significant inter- nor intra­stack Cl⋯Cl inter­actions. There are several anion–cation hydrogen-bonding inter­actions of the (N—H)pyridine⋯Cl and (N—H)amino⋯Cl types, connecting the chains of cations to the stacks of anions. Both the N—H⋯Cl and π–π stacking inter­actions [centroid–centroid distances 3.61 (8) and 3.92 (2) Å] contribute to the formation of a three-dimensional supra­molecular architecture.

Highlights

  • The asymmetric unit of the title compound, (C6H9N2)2[CuCl4], consists of one cation and one half-anion, bisected by a twofold rotation axis through the metal center

  • The anion exhibits a geometry that is intermediate between a Td and D4h arrangement about the Cu atom

  • The crystal structure contains chains of cations alternating with stacks of anions

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Summary

Structure Reports Online

The asymmetric unit of the title compound, (C6H9N2)2[CuCl4], consists of one cation and one half-anion, bisected by a twofold rotation axis through the metal center. The crystal structure contains chains of cations alternating with stacks of anions. The anion stacks are parallel to the cation chains, with no significant inter- nor intrastack ClÁ Á ÁCl interactions. There are several anion–cation hydrogen-bonding interactions of the (N— H)pyridineÁ Á ÁCl and (N—H)aminoÁ Á ÁCl types, connecting the chains of cations to the stacks of anions. Both the N—HÁ Á ÁCl and – stacking interactions [centroid–centroid distances 3.61 (8) and 3.92 (2) A ] contribute to the formation of a threedimensional supramolecular architecture.

Data collection
DÁ Á ÁA
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