π–π Dimerization of a mono(pyridyl–imine) platinum(II) chelate

Abstract

The cation of the title complex salt, chlorido{2,2-dimethyl-N-[(E)-1-(pyridin-2-yl)ethylidene]propane-1,3-diamine}platinum(II) tetrafluoridoborate, [PtCl(C12H19N3)]BF4, exhibits a nominally square-planar PtIIion coordinated to a chloride ion [Pt—Cl = 2.3046 (9) Å] and three unique N-atom types,viz.pyridine, imine and amine, of the tridentate Schiff base ligand formed by the 1:1 condensation of 1-(pyridin-2-yl)ethanone and 2,2-dimethylpropane-1,3-diamine. The cations are π-stacked in inversion-related pairs (dimers), with a mean plane separation of 3.426 Å, an intradimer Pt...Pt separation of 5.0785 (6) Å and a lateral shift of 3.676 Å. The centroid (Cg) of the pyridine ring is positioned approximately over the PtIIion of the neighbouring cation (Pt...Cg= 3.503 Å).