On the coordination properties of new bicyclophosphite-carbohydrates

The coordination behavior of newly developed bicyclophosphite ligands toward Mo(0), Rh(I), and Pt(II) was studied. Reactions at different ratios of metal to ligand were done. It was found that the ligands act as monodentate ones and form with hexacarbonylmolybdenum( 0) complexes with the general formula Mo(CO)(5)L by replacing only one carbonyl ligand. Coordination experiments toward acetylacetonatodicarbonylrhodium( I) resulted in the formation of undefined compounds. Toward dichlorocyclooctadienylplatinum( II) the monomeric phosphorus ligands act as monodentate ligands forming complexes of the general structure cis-PtCl2L2. All the synthesized platinum-complexes possess cis-configuration (proven by P-31 NMR). The corresponding coordination compounds were isolated and characterized by elemental analyses and H-1, C-13, and P-31 NMR.