Cyanide-bridged Fe(iii)–Co(ii) bis double zigzag chains with a slow relaxation of the magnetisation

Abstract
Reaction of [FeIII(bipy)(CN)4] with fully solvated MII cations [M = Co (1) and Mn (2)] produces the isostructural bis double zigzag chains [[FeIII(bipy)(CN)4]2MII(H2O)]·MeCN·½H2O; 1 exhibits intrachain ferromagnetic and interchain antiferromagnetic couplings, slow magnetic relaxation and hysteresis effects.