Strong magnetic exchange coupling in the cyano-bridged coordination clusters [(PY5Me2)4V4M(CN)6]5+(M = Cr, Mo)Electronic supplementary information (ESI) available: Additional experimental details, and magnetization data for compounds 1and 2. CCDC 730661 (1′) and 730662 (2). For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/b908736b

Reaction of [(PY5Me2)V(MeCN)]2+with [M(CN)6]3−(M = Cr, Mo) affords the star-like clusters [(PY5Me2)4V4M(CN)6]5+, exhibiting S= 9/2 ground states that are exceptionally well-isolated in energy. [ABSTRACT FROM AUTHOR]