Spin Frustration in a Dimeric Mn(II) Complex with a Metallocene-Substituted alpha-Nitronyl Nitroxide Radical This work was supported by grants from DGES (project PB96-0802-C02-01), CIRIT (project SGR 96-00106), Fonds zur Förderung der Wissenschaftlichen Forschung, Vienna (Project P 13128), Austrian Federal Ministry of Science (BMWV), Acción Integrada Hispano-Austríaca (HU-1999-0015), and the 3MD Network of the TMR program of the E.U. (contract ERBFMRX

Abstract

A butterfly structure and competing magnetic exchange interactions between the manganese(II) ions and organic, ruthenocene-substituted α-nitronyl nitroxide (NIT) radicals characterize the spin frustration system of a new dimeric MnII complex (see scheme, IMH=reduced form of the imino nitroxide).