Reactions of the co-ordinatively unsaturated cluster [Os₃(µ-H)(CO)₈{Ph₂PCH₂P(Ph)C₆H₄}] with alkynes RCCR (R = Ph, C₆H₄Me, Me or CF₃); crystal structures of [Os₃(CO)₈{µ₃–η²(∥)–RC₂R}(Ph₂PCH₂PPh₂)](R = Me or CF₃) and electrochemical behaviour of triosmium–alkyne clusters

Synthesis and characterisation of saturated and unsaturated triruthenium clusters containing electronically symmetrical and asymmetrical alkynes

“…The IR spectra of 1b-1h are very similar to that of 1a, with respect to both band frequencies and intensities, which were mostly insensitive to the substituents on the alkyne; all exhibit a bridging CO band besides bands due to the terminal CO ligands. The 1 H NMR spectra of all compounds exhibit multiplets in the d 6.5 and 7.9 region due to the phenyl protons and two multiplets in the d 3-4 region attributed to the dppm methylene hydrogens as previously observed for 1a and other analogous systems [14,16,17]. The 1 H NMR spectra of clusters 1c, 1g, and 1h also exhibit the expected peaks due to the -CHO, -OMe and ferrocenyl hydrogens, respectively (see Table 2).…”

Solution properties, electrochemical behavior and protein interactions of water soluble triosmium carbonyl clusters

“…The corresponding stable monoanion radicals have been studied in detail both from the experimental as well as from the theoretical point of view [5,6]. While the LUMO of organometallic clusters is in general localized on the metal core [7], in the case of the clusters mentioned the ligand plays a significant role in the stability of the radical anions. In fact, the LUMO of [Os 3 (CO) 10 …”

Cleavage of Ge–S and C–H bonds in the reaction of electron-deficient [Os3(CO)8(μ-H)(μ3-Ph2PCH2P(Ph)C6H4)] with Ph3GeSPh: Generation of thiophenol derivatives [Os3(CO)8(μ-H)(μ-SPh)(μ-dppm)] and [Os3(CO)7(μ-H)(μ-SPh)(μ3-SC6H4)(μ-dppm)]

“…Unfortunately, the reaction does not appear to give any Os-Ge product, instead only the thiolato part of the ligand incorporated into the cluster resulting in the formation of [Os 3 (CO) 8 …”

“…The electron-deficient triosmium cluster [Os 3 (CO) 8 (µ-H)(µ 3 -Ph 2 PCH 2 P(Ph)C 6 H 4 )] (1) derived from the decarbonylation of the decacarbonyl compound [Os 3 (CO) 10 (µ-dppm)] has attracted considerable interest for many years and its chemistry has been thoroughly investigated during the last decade to reveal its catalytic potential as well as applications in organic synthesis. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] Electron-deficiency in 1 makes it more vulnerable to attack by nucleophiles and practically it reacts with a wide range of electron donor ligands under mild conditions relative to electron precise complexes.…”

“…[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] Electron-deficiency in 1 makes it more vulnerable to attack by nucleophiles and practically it reacts with a wide range of electron donor ligands under mild conditions relative to electron precise complexes. We also reported the Os-Sn compound [Os 3 (CO) 9 (µ-SPh)(µ 3-SnPh 2 )(NCMe)(η 1 -C 6 H 5 ) 2 ] from the reaction of [Os 3 (CO) 10 (NCMe) 2 ] with Ph 3 SnSPh.…”