Search results for "Rhodium compounds"
showing 3 items of 3 documents
A versatile rigid binucleating ligand for Rh2(μ-Cl)2 moieties: its application as a catalyst in hydrogenation and cyclopropanation
2003
A rigid non-deforming "MCl 2 M" binucleating ligand [7,8-μ-S(4'-C 6 H 3 (CH 3 ))S-C 2 B 9 H 1 0 ] - able to held the two rhodium atoms in a cooperative distance has been synthesized. The original two bridging chlorides are retained in [Rh 2 (C 5 Me 5 ) 2 Cl 2 {7,8-μ-S(4'-C 6 H 3 (CH 3 ))S-C 2 B 9 H 1 0 }] + . Hydrogenation of 1-hexene is 10 times faster with [Rh 2 (C 5 Me 5 ) 2 Cl 2 {7,8-μ-S(4'-C 6 H 3 (CH 3 ))S-C 2 B 9 H 1 0 }] + than with [Rh 2 (C 5 Me 5 ) 2 Cl 4 ]. A hydrogenation mechanism has been proposed which assumes that [Rh 2 (C 5 Me 5 ) 2 (Cl)(H){7,8-μ-S(4'-C 6 H 3 (CH 3 ))S-C 2 B 9 H 1 0 }] + is the first generated species in the process.
Analysis of the main structural trends for biscyclometalated dinuclear rhodium compounds of general formula Rh2(O2CR)2(PC)2·2H2O
2008
Abstract A new series of biscyclometalated dinuclear rhodium (II) compounds with the general formula Rh2(O2CR)2(PC)2 · 2H2O, being PC = (C6H4)P(C6H5)2, R = CH3 (1 · 2H2O), PC = [(p-CH3 OC6H3)P(p-CH3 OC6H4)2], R = CF3 (2 · 2H2O), PC = (C6H4)P[CH(CH3)2]2, R = CH3 (3 · 2H2O) and PC = (C6H4)P(C6H5)2, R = C6F5 (4 · 2H2O) has been obtained. The crystal structures for these compounds have been determined by X-ray diffraction and the main structural trends, bond lengths, bond angles and torsion angles have been analyzed, and have also been compared with the structural parameters for different analogous complexes described previously in the literature.
Analysis of the main structural trends for biscyclometalated dinuclear rhodium compounds with nitrogen donor axial ligands
2009
A new series of biscyclometalated dinuclear rhodium(II) compounds with the general formula Rh 2 (O 2 CR) 2 (PC) 2 · (N) 2 have been obtained, where PC is a cyclometalated phosphine, R an aliphatic group, and N a nitrogen donor ligand. The crystal structures for these compounds have been determined by X-ray diffraction. The most important structural trends have been analyzed, and have also been compared with the same parameters for different analogous compounds described previously in the literature.