A dodecanuclear metallamacrocycle having a multidentate bridging ligand in two different binding modes?

Dalton Transactions Pub Date: 2008-10-09 DOI: 10.1039/B810711D

Abstract

The reaction of Mn(OAc)2·4H2O with 2,6-dimethoxybenzoylsalicylhydrazide (H3dmbshz) leads to a dodecanuclear manganese metallamacrocycle [Mn12(dmbshz)12(EtOH)6], 1. The successive manganese centers are connected by the hydrazide N–N groups of the ligands in an alternating pentadentate binding mode, hexadentate binding mode. The alternation results in two alternating chelation modes around the metal centers, a tridentate–tridentate chelation mode and a bidentate–tridentate chelation mode. The metal ions in 1 are in a ?(AAΔBCAΛB)(AAΔBCAΛB)? chiral sequence, the alternation of the chiralities expanding the cyclic ring system to a 36-membered dodecanuclear manganese metallamacrocyclic ring system with S6 point group symmetry.

Graphical abstract: A dodecanuclear metallamacrocycle having a multidentate bridging ligand in two different binding modes
Recommended Literature