A new polynuclear complex of manganese stearate has been prepared by substi
tution of acetate with stearic acid. The stearate ion with long alkyl chain
was used to isolate molecular Mn-12 cluster from each other. The Mn-12-ste
arate compound prepared is soluble ill most organic solvents and resistant
against water catalyzed reduction. The Mn-12-stearate compound shows simila
r electrochemical, magnetic properties to the pristine Mn-12-acetate.