Homogeneous catalytic carbonylation of nitroaromatics. 4. Preparation and characterization of ruthenium radical cations

Investigation of the reactivity of palladium(0) complexes with nitroso compounds: relevance to the palladiumphenanthroline-catalysed carbonylation reactions of nitroarenes

“…The electron transfer from rhodium(-I) [11] and ruthenium(0) [12] complexes to nitro compounds has been followed in situ by EPR but the final organometallic products of these reactions are diamagnetic complexes. On the other hand the reaction between Pd(phen)L (L= pbq, dba) and nitrosobenzene allowed for the isolation of complex 1 as a stable paramagnetic compound.…”

Mononuclear Complexes of Ruthenium and Osmium Containing η1 Carbon Ligands

“…These salts react with CH 2 C1 2 or Bu 3 SnCl to provide [RuCl(CO) 3 3 {a-N(=O)Bu t }(PPh 3 ) 2 ] + and [Ru(K 2 -O 2 C 6 Cl 4 )(CO) 2 (PPh 3 ) 2 ] + are isolated. 37 The motivation for this study came f r o m the proposal that single electron transfers are important in the homogeneous catalytic carbonylation of nitroaromatics to carbamates, 38 ' 39 in particular in the reaction of (17) with ArNO 2 to provide initially [Ru(CO) 3 …”

Binuclear Complexes of Ruthenium and Osmium Containing Metal Metal Bonds

“…42 ' 43 Evidence has been provided for the formation of [Ru 2 (CO) 6 (dppe) 2 ] 2+ in the oxidation of [Ru(CO) 3 (dppe)] 44 4 ]. A crystal structure determination of (39) revealed that this compound adopts a staggered conformation with the two ruthenium atoms being separated by a distance of 0.267 10(6) nm, corresponding to a ruthenium-ruthenium bond, while [Ru 2 (P 3 O 9 ) 2 (u-CO) 2 (CO) 2 ] 4~ (40)* was found to adopt a structure analogous to that of [Ru 2 (cp) 2 (u-CO) 2 (CO) 2 ] (cp = rj-Cp, 47 50 In contrast, protonation of (38) with CF 3 CO 2 H results in its fragmentation and the formation of mononuclear [Ru(Ph 2 PCH 2 SiMe 2 OH)(CO) 2 (CO 2 CF 3 ) 2 ] .…”