Solvothermal synthesis of [Cr10(μ-O2CMe)10(μ-OR)20] ‘chromic wheels’ with antiferromagnetic (R = Et) and ferromagnetic (R = Me) Cr(III)···Cr(III) interactions

Two decanuclear cyclic Cr(III) complexes have been synthesised in high yield by solvothermal techniques: magnetic susceptibility studies reveal ferromagnetic Cr⋯Cr exchange in one, and antiferromagnetic Cr⋯Cr exchange in the other.