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Abstract: Two pyrazolate-bridged dinuclear Pd(II) diimine complexes {[(phen)Pd]2L2}(NO3)2 (1) and {[(bpy)Pd]2L2}(NO3)2 (2) have been synthesized through metal–metal interaction and spontaneous deprotonation from 1H-3,5-diphenylpyrazole (HL) in aqueous solution. These complexes show Pd(II)⋯Pd(II) interactions and anion binding have been characterized by elemental analyses, 1H and 13C NMR, ESI-MS, UV–Vis and luminescent spectroscopy, and single crystal X-ray diffraction methods. [Copyright &y& Elsevier]

In the title complex, [Pd2(C10H12O4)2(C10H8N2)2](PF6)2--CH3CN, the PdII centers have a distorted cis-square-planar geometry defined by an O,O'-bidentate bisacetylacetonate dianion ligand and a chelating 2,20-bipyridine ligand. The crystal structure is stabilized by electrostatic forces between the cations and anions, intermolecular π-π stacking interactions between pairs of 2,20-bipyridine rings, and weak intermolecular hydrogen bonds involving exafluorophosphate anions (C—H…F) and the solvent acetonitrile molecules (C—H…N). [ABSTRACT FROM AUTHOR]