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) in the preparation of these squares via metal-templated self-assembly. These types of squares have important applications in modern chemistry 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 ligand 9S3 (1,4,7 trithiacyclononane) was used with Pt(II). 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 a new crystal structure of a complex used as corner units. The synthesis and characterization of [Pt(9S3)(CH₃CN)₂]²⁺, including its single-crystal X-ray structures, is reported here. Moreover, we are interested in looking at the dynamic effects of acetonitrile on our complex. Finally, we investigate the properties of our molecular square, which includes looking at the orientation of counter-ion and testing the host-guest chemistry properties of the square.