New palladium(II) complexes of (N,N-dimethylamino)alkoxy-1,3,2-oxazaphospholidine ligands

New P,N-bidentate aminophosphite ligands OCH2CH2N(R)PO(CH2)nNMe2 (2a R=Me, n=2; 2b R=t-Bu, n=2; 3 R=t-Bu, n=3) have been obtained and characterized. Complexation of all the ligands with [PdCl2(COD)] (COD=1,5-cyclooctadiene) has been investigated. Ligands 2a,b have been found to form mononuclear chelate complexes [PdCl2(PN)]. Ligand 3 forms a binuclear compound [PdCl2(PN)]2, in which molecules 3 act as P,N-bidentate bridges. The obtained compounds have been characterized by multinuclear NMR, IR spectroscopy, mass spectrometry and sedimentation analysis. The molecular structure of [PdCl2L] (L=2b) has been determined by single crystal X-ray diffraction.