Circular Dichroism of Transition Metal Complexes and Sugar Derivatives Having a Free 1,3-Diol System or “Isolated” Hydroxyl Group

Abstract
Heptofuranose derivatives 1–6 having free 1, 3-diol systems form in situ complexes with Mo2(OAc)4 whose CD spectra permit the assignment of absolute configuration at C-5 using a sector rule proposed by G. Snatzke.2–6 The interpretation of CD spectra of analogous complexes formed from derivatives 7–12 was more complicated and did not lead to direct configuralional conclusions. CD spectra of complexes formed from Rh2(CF3COO)4 and sugar derivatives 13–21, containing an “isolated” hydroxyl group, permit the assignment of absolute configuration. Conclusions were corroborated by the investigation of CD spectra of rhodium complexes with compounds 22–27.