title: Enforcement of a high-spin ground state for the first 3d heterometallic 12-metallacrown-4 complex.
abstract: Cu(II)(DMF)2Cl2[12-MC(Fe(III)N(Shi))-4](DMF)4·2DMF was synthesized as the first heterometallic transition metal 12-MC-4 complex. The purposeful placement of specific metal ions in the different sites of the metallacrown attains the establishment of a high-spin ground state. Inducing the anticipated superior exchange interactions, the central Cu(II) guest ion averts the common mutual cancellation of the spins, as is observed in the corresponding homometallic compounds.
authors.affiliation: Institute of Inorganic and Analytical Chemistry, Johannes Gutenberg University Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany. rentschler@uni-mainz.de.
authors.forename: Peter
authors.initials: P
authors.lastname: Happ
authors.forename: Eva
authors.initials: E
authors.lastname: Rentschler