Unexpected formation and crystal structure of tetrakis(1H-pyrazole-κN2)palladium(II) dichloride

The title salt, [Pd(C3H4N2)4]Cl2, was obtained unexpectedly by the reaction of palladium(II) dichloride with equimolar amounts of 1-chloro-1-nitro-2,2,2-tris(pyrazolyl)ethane in methanol solution. The Pd2+ cation is located on an inversion centre and has a square-planar coordination sphere defined b...

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Bibliographic Details
Main Authors: Thomas Wagner, Nena Christiansen, Cristian G. Hrib, Dieter E. Kaufmann, Frank T. Edelmann
Format: Article
Language:English
Published: International Union of Crystallography 2014-12-01
Series:Acta Crystallographica Section E
Subjects:
Online Access:http://scripts.iucr.org/cgi-bin/paper?S160053681402460X
Description
Summary:The title salt, [Pd(C3H4N2)4]Cl2, was obtained unexpectedly by the reaction of palladium(II) dichloride with equimolar amounts of 1-chloro-1-nitro-2,2,2-tris(pyrazolyl)ethane in methanol solution. The Pd2+ cation is located on an inversion centre and has a square-planar coordination sphere defined by four N atoms of four neutral pyrazole ligands. The average Pd—N distance is 2.000 (2) Å. The two chloride anions are not coordinating to Pd2+. They are connected to the complex cations through N—H...Cl hydrogen bonds. In addition, C—H...Cl hydrogen bonds are observed, leading to a three-dimensional linkage of cations and anions.
ISSN:1600-5368