Here for the first time the synthesis and characterization of two new trans-platinum complexes, trans-[PtCl<sub>2</sub>{HN=C(OH)C<sub>6</sub>H<sub>5</sub>}<sub>2</sub>] (compound 1) and trans-[PtCl<sub>4</sub>(NH<sub>3</sub>){HN=C(OH)<sup>t</sup>Bu}] (compound 2) [with <sup>t</sup>Bu = C(CH<sub>3</sub>)<sub>3</sub>] are described. The structures have been characterized using nuclear magnetic resonance spectroscopy and X-ray single-crystal diffraction. In compound 1 the platinum cation, at the inversion center, is in the expected square-planar coordination geometry. It is coordinated to two chloride anions, trans to each other, and two nitrogen atoms from the benzamide ligands. The van der Waals interactions between the molecules produce extended two-dimensional layers that are linked into a three-dimensional structure through π...π intermolecular interactions. In compound 2 the platinum cation is octahedrally coordinated by four chloride anions and two nitrogen atoms from the pivalamide and ammine ligands, in trans configuration. The molecular packing is governed by intermolecular hydrogen bonds and van der Waals interactions.
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