A dinuclear iron(II) complex, [(TPyA)FeII(THBQ(2-))FeII(TPyA)](BF4)2 [TPyA = tris(2-pyridylmethyl)amine; THBQ(2-) = 2,3,5,6-tetrahydroxy-1,4-benzoquinonate] exhibiting both spin crossover with hysteresis and ferromagnetic exchange.