Synthesis and characterization of high-nuclearity osmium–platinum cluster compounds. The molecular structures of [Os 6 Pt 2 (CO) 16 (C 8 H 12 ) 2 ] and [Os 6 Pt 2 (CO) 16 (C 8 H 12 ){P(OMe) 3 } 2 ](C 8 H 12 = cyclo-octa-1,5-diene)

The reaction of [Os6(CO)18 –n(NCMe)n](n= 1 or 2) with [Pt(C8H12)2](C8H12= cyclo-octa-1,5-diene) results in the formation of [Os6Pt2(CO)17(C8H12)2](1) and [Os6Pt2(CO)16(C8H12)2](2) respectively. Complex (1) is known to have a Pt-bicapped octahedral geometry. Complex (2) crystallizes in the monoclinic space group C2/c with a= 21.178(3), b= 11.683(2), c= 17.383(2)Å, β= 113.83(1)°, Z= 4. The structure has been refined to R′= 0.034 (R= 0.044) for 2 …