DETERMINATION OF THE ABSOLUTE-CONFIGURATION OF CHIRAL 1,3-DIOLS BY CDSPECTROSCOPY OF THEIR [MO-2(OAC)(4)] COMPLEXES

Bidentate complexes between [Mo-2(OAc)(4)] and 1,3-diols (1-16) show s everal CD bands in the 250 - 600 nm range. A previously published sect or rule for the prediction of the sign of band II at ca. 400 nm for ri gid cyclic 1,3-diols is extended to open-chain (7-12) as well as ''sem i-rigid'' 1,3-glycols (1-6 and 14-16). Their absolute configuration ca n be correlated with the sign of this CD band. This in situ complexati on needs minute amounts of substance and therefore is a very convenien t tool for the determination of the absolute configuration of such cla ss of compounds.