Used as a catalyst precursor in organometallic synthesis and homogeneous catalysis, particularly in olefin metathesis and C–H activation reactions. Its labile acetonitrile ligands readily dissociate, allowing coordination of various substrates and facilitating catalytic cycles. Commonly employed in the development of ruthenium-based catalysts for fine chemical and pharmaceutical synthesis. Also utilized in materials science for depositing ruthenium-containing thin films via chemical vapor deposition techniques.