Ruthenium compounds are chemical substances that contain the element ruthenium, a rare transition metal found in the platinum group. These compounds can exist in various oxidation states, typically ranging from -2 to +8, and are known for their diverse chemical properties. They are often used in catalysis, electronics, and as precursors in the production of other materials. Many ruthenium compounds exhibit interesting biological activities, making them subjects of research in medicinal chemistry. Some studies suggest potential applications in cancer treatment, as certain compounds can selectively target cancer cells. Their unique properties continue to inspire research in both industrial and pharmaceutical fields.