Determination of the Absolute Configuration of Alkyl(phenyl)thiophosphinic O‐Acids and of O‐Alkyl Alkylthiophosphonates from the Circular Dichroism of Their Complexes with [Mo2(O2CCH3)4]

The absolute configuration of the phosphorus compounds (2) and (3) can be determined from the circular dichroism of their in situ complexes with the dimolybdenum compound (1). The solvent is CF3CO2H or pyridine. In direct CD measurements—without (1)—the Cotton effect lies in a difficultly accessible wavelength region.