Spin crossover in the cyanide-bridged MoVMnIIIsingle-chain magnet containing FeIIcationsElectronic supplementary information (ESI) available: Additional synthetic, structural, and magnetic details. CCDC 793931(1) and 821662(2). For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c1cc13627e

A 1D MoVMnIIIchain compound balanced by {Fe[HC(3,5-Me2pz)3]2}2+dications was prepared. This complex displays a typical single-chain magnet character associated with the MoVMnIIIchain and a spin crossover phenomenon arising from cationic Fe(ii) subunits. The spin crossover behavior tends to slightly affect single-chain magnetic properties at low temperature. [ABSTRACT FROM AUTHOR]