SYNTHESIS AND CHARACTERIZATION OF 1,3-DIAMINE(PHOSPHINE)-RUTHENIUM (II) COMPLEXES USING MONODENTATE AND BIDENTATE PHOSPHINE LIGANDS

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.