Synthesis and Structure of Heterospin Compounds Based on the [Mn6(O)2Piv10]-Cluster Unit and Nitroxide

Reaction of [Mn6(O)2Piv10(Thf)4].Thf with 2,4,4,5,5-pentamethyl-4,5-dihydro-1H-imidazolyl-3-oxide-1-oxyl (NIT-Me) produces different heterospin compounds depending of the solvent used in the synthesis. Among the latter a new molecular magnet [Mn6(O)2Piv10(Thf)2(NIT-Me)Mn6(O)2Piv10(Thf)(CH2Cl2)(NIT-Me)] with Tc = 3.5 K has been found.