Pt-Xanthene Bromide Complex for Low-Yield Hydroformylation

The patent changes the chemical parameters of the complex by replacing chloride ligands with bromide ligands and modifying the phosphine ligand structure (adding alkyl and aryl groups at positions R1-R8). This parameter change in the complex composition transforms the catalytic properties, increasing both yield and efficiency in hydroformylation reactions compared to the original Pt(Xantphos)Cl2 complex.

The patent creates a composite complex structure by combining Pt center, modified Xantphos ligand with various R groups (R1-R8), and bromide ligands. This composite approach integrates multiple components with different functions: the Pt provides catalytic activity, the modified Xantphos provides structural framework and electronic properties, and the bromide ligands enhance catalytic performance. The resulting composite complex achieves superior yield while maintaining a well-defined structure.