Molecular Dynamics of Mixed-Metal Clusters. (13)C and (1)H NMR Studies of H2FeRu3(CO)13, H2FeRu2Os(CO)13, and H2FeRuOs(CO)13

摘要

Variable temperature H and carbon 13 NMR spectra of H2FeRu3(CO)13, H2FeRu2Os(CO)13, and H2FeRuOs(CO)13 have been measured and interpreted in view of three distinct fluxional processes. In the lowest temperature process the bridging and terminal carbonyls bound to Fe undergo localized exchange. The second process involves migration of the carbonyls around the face of the tetrahedral cluster that contains the bridging carbonyls. The highest temperature process involves a subtle reorganization of the metal framework.