A novel enantiopure proline-derived triazacyclononane: synthesis, structure and application of its manganese complex

The X-ray crystal structure and electrochemical data of a manganese complex [L2Mn2III(mu -O)(mu -AcO)(2)][PF6](2) with L being an enantiopure C-3-symmetric 1,4,7-triazacyclononane derived from L-proline are compared to those of [Me-3- TACN(2)Mn(2)(III)(mu -O)(mu -AcO)(2)][PF6](2); catalytic studies reveal the applicability of the complex in enantioselective epoxidations.