A mixed valence manganese triangle in a trigonal lattice: structure and magnetism

作者：Taleb Nassiba; Richards Victoria J; Argent Stephen P; van Slageren Joris; Lewis William; Blake Alexander J; Champness Neil R^*

来源：Dalton Transactions, 2011, 40(22): 5891-5894.

DOI：10.1039/c1dt10057b

The synthesis, structural and magnetic characterisation of trinuclear manganese cluster, [Mn3O(O2C-anth)(6)(HOCH3)(3)] 1 (where O2C-anth = 9-anthracenecarboxylate), with crystallographic three-fold (C-3) symmetry, are described. The cluster was prepared by a carboxylate exchange reaction between HO2C-anth and [Mn12O12(O2CMe)(16)(H2O)(4)] with concomitant fragmentation of the dodecanuclear Mn core of the starting material to form a trinuclear Mn-3(mu(3)-O) cluster capped by six carboxylate ligands. Bond valence sum calculations and SQUID magnetometric measurements establish the oxidation states of the metal ions as Mn-II center dot 2Mn(III) which are antiferromagnetically coupled.

• 出版日期2011