Date Published: August 01, 2009
Publisher: International Union of Crystallography
Author(s): Gregory A. Farnum, Robert L. LaDuca.
In the title salt, C16H21N4+·ClO4−·0.5C4H4O4, fumaric acid molecules, situated across crystallographic inversion centres, are O—H⋯N hydrogen bonded to two protonated 1,4-bis(4-pyridylmethyl)piperazine cations, forming trimolecular units. These construct one-dimensional supramolecular ribbons by N—H⋯N hydrogen bonding, and further aggregate via π–π interactions [shortest C⋯C contact = 3.640 (1) Å] and perchlorate-mediated C—H⋯O interactions.
For the preparation of bis(4-pyridylmethyl)piperazine, see: Pocic et al. (2005 ▶). For a cadmium fumarate coordination polymer containing bis(4-pyridylmethyl)piperazine, see: Martin et al. (2009 ▶).