CHI-JUNG SU2026-10-162026-10-161994-11-01Pure ID: 14968457Pure UUID: 9220343a-8439-4bb2-948a-2103a51a2ef010.1021/om00023a016https://www.scopus.com/pages/publications/0001007167https://scholars.csmu.edu.tw/handle/123456789/26767An X-ray analysis of(C5Me5)MoRu3(CO)12H at 110 K showed a butterfly metal framework, on which the oxygen atom of the disordered μ4-η2-CO ligand is linked to either the Ru or the Mo atom at two opposite wingtip positions, providing a unique example of isomerism involving the quadruply bridging CO ligand. These two butterfly isomers exist in solution together with a third tetrahedral isomer and undergo slow exchange with this last isomer on the NMR time scale, as demonstrated by 1H and 13C NMR studies.3enjournal article