Acta Cryst. (2007). E63, m2510-m2511  [ doi:10.1107/S1600536807042766 ]

A dimer-to-dimer metal-metal linear aggregate from a nitrate-bridged cis-(2,2':6',2''-terpyridyl-³N)palladium(II) cofacial dimer

G.-Q. Mei, K.-L. Huang and H.-P. Huang

Abstract: The asymmetric unit of the title compound, -nitrato-bis[(2,2':6',2''-terpyridyl-³N)palladium(II)] hexakis(hexafluoridophosphate) acetonitrile solvate, [Pd₂(C₁₅H₁₁N₃)₂NO₃]PF₆·C₂H₃N, contains two cationic dimers, [Pd₂(C₁₅H₁₁N₃)₂NO₃]³⁺, six (PF₆)^- anions and one CH₃CN solvent molecule. Each cationic dimer is built upon (-1,3-NO₃) bridging coordination to two cis-(2,2':6',2''-terpyridine)Pd^II units in a cofacial arrangement. The Pd atom is four-coordinated by a tridentate chelating 2,2':6',2''-terpyridine ligand and one bridging nitrate ion, to form a distorted square-planar geometry. The two dimers aggregate alternately along a linear chain via PdPd interactions [intradimer, 3.09 (1) Å; interdimer, 3.33 (1) Å]. The dimer-to-dimer aggregates arrange in a zigzag orientation along the b axis through - interactions [centroid-centroid distances 3.521 (6)-3.894 (6)Å] between terpyridine ligands and weak intermolecular hydrogen bonds involving hexafluoridophosphate anions (C-HF) and the solvent acetonitrile molecule (C-HN).

Online 15 September 2007

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