| Popis: |
The new clusters Os 3 Pt(CO) 11 L 2 , where L=PPh 3 or P t Bu 2 Ph, have been obtained as major products of the reaction of Os 3 (CO) 11 (NCMe) with sources of PtL 2 . A single crystal X-ray crystallographic investigation of the structure where L=PPh 3 indicates that the molecules consist of an equilateral triangle of osmium atoms, one edge of which is bridged by a PtL fragment. A second phosphine ligand occupies an equatorial site on the unique osmium atom. Each Os-Pt edge is bridged by a carbonyl ligand, while the remaining nine carbonyl ligands are terminally bound to osmium atoms. The minor products from the reaction of Os 3 (CO) 11 (NCMe) and PtL 2 are phosphine-substituted derivatives of Os 3 (CO) 12 and the raft clusters Os 6 (CO) 21− n (NCMe) n , ( n =1,2). |
