Polyethylene Glycol-bound Ruthenium Carbene Complex is widely used in organic synthesis, particularly in olefin metathesis reactions. Its PEG-bound nature enhances solubility in various solvents, making it suitable for homogeneous catalysis. This complex is employed in the synthesis of pharmaceuticals, where it facilitates the formation of carbon-carbon double bonds with high selectivity and efficiency. Additionally, it is used in polymer chemistry to create advanced materials with tailored properties. The PEG modification also simplifies catalyst recovery and recycling, reducing waste and improving sustainability in industrial processes. Its application extends to fine chemical production, where it enables the development of complex molecular structures with precision.