One main focus in our group is the preparation of transition metal complexes that will self-assemble into molecular squares. We are interested in using thioether complexes of Pt(II) and Rh(III) in the preparation of these squares formed via metal-templated self-assembly. These types of squares have important applications due to their wide usage throughout supramolecular chemistry, molecular recognition, self-assembly, and host-guest chemistry. In order to control bond angles and geometry, the polydentate chelating ligands 9S3 (1,4,7 trithiacyclononane) and 12S4 (1,4,710-tetrathiacyclododecane) were used with Pt(II) and Rh(III), respectively.  The squares were formed by linking the corners with 4,4'-bipyridine. Two different methods have been attempted to form the Pt molecular square. Furthermore, we wish to report two new crystal structures of complexes used as corner units.  The synthesis and characterization of [Pt(9S3)(CH₃CN)₂]^{2 +} and [Rh(12S4)Cl₂](PF₆), including their single-crystal X-ray structures, are reported here.