Abstract :
The neutral Ru(II), chelating phosphine or diphosphine with 1,3-diamine (1,3-diamino-2-propanol) of type [RuCl2(PP)(NN)], are readily synthesized in very good yields at an inert atmosphere using dichloromethane as solvent. For the first time, the ruthenium(II) complexes: [trans-dichloro- (bis(triphenylphosphine)(1,3-diamino-2-propanol)ruthenium(II)] (2), [trans-dichloro(1,3-bis (diphenylphosphino) propane)(1,3-diamino-2-propanol)ruthenium(II)] (4) and [trans-dichloro(bis(ether-phosphine)- (1,3-diamino-2-propanol)ruthenium(II)] (6) have been prepared at room temperature starting from [RuCl2(PPh3)3], [RuCl2(Ph2PCH2CH2OCH3)2] and [RuCl2(dppp)2], respectively. Trans-RuCl2 with nitrogen atoms are trans to phosphorus atoms are structurally favored (kinetic) isomer. This structural phenomenon has been monitored by 31P{1H} NMR in CD2Cl2. All the mentioned complexes were fully characterized by NMR, IR, and FAB-MS as well as elemental analysis.
