Dodecacarbonyltriosmium

Synthesis and diphosphine ligand fluxionality in Os3(CO)10(bmi): Kinetic evidence for nondissociative diphosphine isomerization and X-ray crystal structure of 1,1-Os3(CO)10(bmi)

“…The acetonitrile-substituted cluster 1,2-Os 3 (CO) 10 -(MeCN) 2 (1) was prepared from Os 3 (CO) 12 [13], which in turn was obtained from the high-pressure carbonylation of OsO 4 using a 500 mL Parr 4571 series autoclave [14]. The 2,3-dichloro-N-p-tolylmaleimide that was used in the preparation of the bmi ligand was prepared from 2,3-dichloromaleic anhydride and p-toluidine [15].…”

Syntheses and Fluxional Processes of Diphenyl(2‐thienyl)phosphane Derivatives of Triosmium Clusters

“…In all cases surveyed in this study, the ligand initially coordinates as a monodentate phos-phane, but further activation/metallation of the ligand is possible at elevated temperatures, although the osmium clusters are considerably less reactive than their ruthenium analogues. [20] Experimental Section General Remarks: The clusters [Os 3 (CO) 12 ] [47] and [Os 3 (µ-H) 2 -(CO) 10 ] [48][49][50] and the ligand diphenyl(2-thienyl)phosphane [20] were synthesised by published methods. Solvents were dried by standard methods prior to use.…”

New osmium cluster compounds containing the heterocyclic ligand 2,3-bis-(diphenylphosphino)quinoxaline (dppq): Ligand isomerization and crystal structures of dppq, the isomeric clusters Os3(CO)10(dppq), and HOs3(CO)9[μ-2,3-PhP(η1-C6H4)(Ph2P)quinoxaline]

“…Cluster 1 was prepared from Os 3 (CO) 12 , Me 3 NO, and MeCN [12], while the parent cluster Os 3 (CO) 12 was synthesized from OsO 4 and CO [13]. The dppq ligand employed in our studies was synthesized from 2,3-dichloroquinoxaline and Ph 2 PH, as described in detail below.…”