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A dynamic distortion model for the magnetic behavior of clusters which contain equilateral triangles of exchange coupled spins is derived using the assumptions of (i) isotropic coupling and (ii) a linear relationship between the coupling constants and interatomic distances. The model is shown to be consistent with experimental data for complexes of the form [M3O(RCOO)6]+, M=Fe,Cr. The spectrum of magnetic states resulting from the dynamic distortion model is found to be very similar to that of the isoceles triangle model of Kambe, but the present model is physically more satisfactory.