title: trans-Bis(perchlorato-κO)tetra-kis(1H-pyrazole-κN)copper(II).
abstract: The title compound, [Cu(ClO(4))(2)(C(3)H(4)N(2))(4)], was obtained unexpectedly by the reaction of copper(II) perchlorate hexa-hydrate with equimolar amounts of 1-chloro-1-nitro-2,2,2-tripyrazolylethane in methanol solution. The crystal structure comprises octa-hedrally coordinated Cu(2+) ions, located on an inversion centre, with four pyrazole ligands in the equatorial plane. The average Cu-N distance is 2.000 (1) Å. Two perchlorate ions are coordinated to copper in trans positions [Cu-O = 2.4163 (11) Å].
authors.forename: Frank T
authors.initials: FT
authors.lastname: Edelmann
authors.forename: Dieter E
authors.initials: DE
authors.lastname: Kaufmann
authors.forename: Steffen
authors.initials: S
authors.lastname: Blaurock
authors.forename: Thomas
authors.initials: T
authors.lastname: Wagner
authors.forename: Viktor
authors.initials: V
authors.lastname: Zapol'skii