Synthesis, reactivity, and X-ray crystal structures of [Os₆Pt₂H₂(CO)₁₆(µ-C₈H₁₀)(C₈H₁₂)]·CH₂Cl₂and [Os₆H(CO)₁₆(µ-C₈H₁₁)]. Model compounds for C–H activation

Synthesis and Structure of Two New High Nuclearity Ru/Pt Mixed‐Metal Clusters

“…The MeC-N distance of 1.28(2) Å in both molecules is This type of triply bridging nitrile ligand has been reported only in one previous instance, in the compound [Os 6 Pt(CO) 17 (NCMe)(COD)]. [14] The CϪN bond length in that case was intermediate between a triple and a double bond [1.22(3) Å ], and the distribution of metal-metal bonds between the atoms bridged by the MeCN unit was different. The bridging nitrile was considered to be a four-electron donor.…”

“…The silica present in the reaction mixture is presumed to assist the formation of the active fragment [Pt(MeCN) 2 ] 2ϩ , which undergoes addition to [Ru 5 C(CO) 14 ] 2Ϫ (by analogy with the reactions involving [PtCl 2 (COD)], see ref. [4] ).…”

“…Therefore, a reaction of [Ru 5 C(CO) 14 32 ]. The detailed synthesis and structure of this compound will be reported elsewhere.…”

“…[4] ). The hypothetical monomer [Ru 5 PtC(CO) 14 2 ] in dichloromethane in the presence of silica. Its identity was proven by infrared spectroscopy and mass spectrometry.…”

Medium- and High-nuclearity Clusters of Ruthenium and Osmium

“…161 ' 217 ' 363 ' 364 Reaction of Os 6 Pt(^3-NCMe)(CO) 17 (C 8 H 12 ) or its isomer Os 6 Pt(|x-NCMe)(CO) 17 (C 8 H 12 ), or the phosphine-substituted derivative Os6Pt(|i 3 -NCMe)(CO) 17 (dppe), with CO gives Os 6 (^3--n 2 -NCMe)(CO) 19 (141). 217 Os 6 (CO) 18 (98) reacts with excess pyridine to afford [Os 5 (CO), 5 ] 2 " together with small amounts of Os 6 (jn 4 -r| 2 -CO)(CO) 16 (py) 2 (142); the latter is a spiked trigonal bipyramid, with a CO ligand in an unusual coordination mode and the pyridines coordinated to the spike osmium. 205 Reaction of (98) with NCO" affords [Os 6 (u-NCO)(CO) 17 …”