Minute stoichiometric bimetallic clusters rich in tin (PtSn 2, RhSn and RuSn 2) are powerful selective hydrogenation catalysts: these "molecular metallic" entities, supported on mesoporous silica characterized by aberration-corrected electron microscopy, yield high percentages of cyclododecene (CDE) at fractional conversions ranging from 0.45 to 0.70 the parent cyclododecatriene (CDT) modest temperatures under solvent-free conditions.

This review describes recent studies on the synthesis and characterization of new polynuclear ruthenium-tin cluster complexes, their conversion to heterometallic nanoparticles, some applications as catalysts for hydrogenation unsaturated organic molecules commercial interest.

The triruthenium-tritin cluster complex, Ru3(CO)9(μ-SnPh2)3, 13 was obtained from the reaction of Ru3(CO)12 with Ph3SnH. Compound reacts Pt(PBut3)2 to yield three new Pt(PBut3) adducts Ru3(CO)9(μ-SnPh2)3[Pt(PBut3)]x, 14−16 x = 1 − 3 formed by addition groups Ru−Sn bonds. complexes form a novel series trimetallic having planar arrangements metal atoms. UV−vis absorptions four shift progressively longer wavelengths as number platinum atoms is added cluster. electronic structures these have...

Ph2SnH2 reacts with 2 equiv of Ru(CO)5 to give the compound [Ru(CO)4H]2(μ-SnPh2) (1) in 57% yield by loss CO from each molecule and an oxidative addition Sn−H bond ruthenium atom. When 1 was irradiated visible radiation, Ru2(CO)8(μ-SnPh2) (2) obtained hydrogen. A mechanism involving followed H2 readdition is supported isotopic labeling studies. Compound Pt(PBut3)2 new trimetallic Ru2(CO)7(μ-SnPh2)(μ-H)2(μ-PtPBut3) (3). 3 contains a Pt(CO)(PBut3) group bridging Ru−Ru two hydrido ligands....

The new compound Ir(COD)(CO)2GePh3, 1, was obtained when a solution containing [Ir(COD)Cl]2 and HGePh3 treated with of BuLi under purge CO. tin homologue Ir(COD)(CO)2SnPh3, 2, similarly by replacing the reagent HSnPh3. reaction CO in absence yielded HIr(CO)3(GePh3)2, 3. When 3 heated to reflux toluene solvent, three compounds were formed: Ir2(CO)6(GePh3)2(μ-GePh2), 4; H2Ir2(CO)4(GePh3)2(μ-GePh2)2, 5; Ir2(CO)8[μ-Ph2Ge(OH)GePh2](μ-GePh2)(GePh3)2(μ-H), 6. yield 5 increased performed an...

The compound Rh(CO)(4)GePh(3), 3, was obtained in a high yield (95%) from the reaction of [Rh(CO)(2)Cl](2) with LiGePh(3) under CO atmosphere. Reaction 3 HGePh(3) yielded new dirhodium Rh(2)(CO)(6)(GePh(3))(2)(mu-GePh(2)), 4 (55% yield), by loss and combination one equivalent two equivalents 3. Compound contains Rh-Rh bond bridging GePh(2) ligand formed cleavage phenyl group GePh(3) ligand. reacts Pt(PBu(t)(3))(2) to add Pt(PBu(t)(3)) form PtRh(2)(CO)(6)(GePh(3))(2)(PBu(t)(3))(mu-GePh(2)), 5...

The compounds HM(CO)4SnPh3, M = Os (10), Ru (11) are activated in the presence of Pt(PBut3)2 and Pd(PBu(t)3)2 toward insertion PhC2H into M-H bond. PtOs(CO)4(SnPh3)(PBu(t)3)[mu-HCC(H)Ph], 12, PtOs(CO)4(SnPh3)(PBu(t)3)[mu-H2CCPh], 13, were obtained from reaction 10 with Pt(PBu(t)3)2. Compounds 12 13 isomers containing alkenyl ligands formed by molecule Os-H bond at both substituted unsubstituted carbon atoms alkyne. Both contain a Pt(PBu(t)3) group that is bonded to osmium atom bridging...

Triangular Ru3Sn3 clusters have been deposited on an ultra thin film of SiO2 a Mo(112) surface from the cluster complex Ru3(CO)9(μ-SnPh2)3, were fixed by heating to 450 K under vacuum, and then imaged high resolution scanning tunneling microscopy. The are preferentially oriented along SiO4 chains lie top group with attachments neighboring chains. At 700 K, migrate across step edges where fragmentation agglomeration processes occur.

The reaction of Pt(COD)Me2 with HGePh3 in hexane solvent at room temperature for 30 h yielded the two new compounds Pt(COD)(Me)(GePh3), 1 (16%), and Pt(COD)(GePh3)2, 2 (9%), by replacement methyl groups GePh3 ligands. When this was performed under an atmosphere CO compound trans-Pt(CO)2(GePh3)2, 3 obtained 26% yield together a Pt2(CO)2(GePh3)2(μ-GePh2)2, 4 10% yield. Compound from 51% additional quantity 16% treatment CO. All four products were characterized single crystal X-ray diffraction...

At 110 °C, the compound HIr(CO)3(GePh3)2 (1) was decarbonylated and transformed into five polynuclear iridium compounds, Ir2(CO)6(μ-GePh2)(GePh3)2 (2), Ir3(CO)6(η1-Ph)2(μ-GePh2)3(GePh3) (3), Ir3(CO)6(η1-Ph)(μ-GePh2)3(GePh3)2 (4), Ir3(CO)6(μ-CO)(μ-GePh2)2(GePh3)3 (5), Ir3(CO)6(η1-Ph)(μ-GePh2)2(GePh3)2[μ-Ge(Ph)(OH)] (6), by a combination of condensation phenyl-cleavage processes. The triiridium compounds 3–6 are all new have been characterized single-crystal X-ray diffraction analyses. Each...

The reaction of Ph3SnOH with Ir4(CO)12 in the presence [Bu4N]OH methanol solvent gave two products, [Bu4N][Ir4(CO)11(SnPh3)] (1; 45% yield) and [Bu4N][Ir4(CO)10(SnPh3)2(μ-H)] (2; 5.5% yield), Ir4(CO)11(PPh3) complex Ir4(CO)10(SnPh3)(PPh3)(μ-H) (3) 44% yield. It is proposed that reactions occur by addition anion [OSnPh3]− generated situ to a CO ligand form stannyl-substituted metallocarboxylate subsequently loses CO2 transfers SnPh3 group metal atom.

The electronically unsaturated complex [Ru3(CO)8(μ3-CMe)(μ-H)2(μ3-H)]2 (1), viewed as a dimer of the 46-electron fragment Ru3(CO)8(μ3-CMe)(μ-H)3, is held together by delocalized bonding involving two triply bridging hydride ligands. Compound 1 exhibits dynamic activity in solution that equilibrates three types reacts with 1,1-bis(diphenylphosphino)methane to form macrocyclic [Ru3(CO)7(μ3-CMe)(μ-H)3]2(μ-dppm)2 (3).