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Paper

Chem. Commun., 2001, 467 - 468, DOI: 10.1039/b010038m

A new class of single-molecule magnets: mixed-valent [Mn12O8Cl4(O2CPh)8( hmp)6]

Colette Boskovic, Euan K. Brechin, William E. Streib, Kirsten Folting, George Christou and David N. Hendrickson

The reaction of (NBun4)[Mn8O6Cl6(O 2CPh)7(H2O)2] with 2-(hydroxymethyl)pyridine (hmpH) or 2-(hydroxyethyl)pyridine (hepH) gives the MnII2MnIII10 complexes [Mn12O8- Cl4(O2CPh)8(hxp)6] [hxp– = hmp– (1) or hep– (2)]; these compounds are core isomers with markedly different magnetic properties, compound 1 having an S = 7 ground state and displaying strong out-of-phase ac susceptibility signals that establish it as a new class of single-molecule magnet, whereas compound 2 is a low-spin molecule with an S = 0 ground state.