Direct synthesis of an heterometallic {Mn~(II)_3Cr~(III)_4} wheel by decompositionofReineckes salt

摘要

A new heterometallic Mn/Cr molecular wheel complex has been synthesized using zerovalentmanganese, Reineckes salt, ammonium thiocyanate and triethanolamine (H,tea) as starting materials.The compound [Mn_3Cr_4(NCS)_6(Htea)_6] (1) has been characterized in terms of its electrochemical, IRand EPR spectroscopic as well as its magnetic properties. The magnetic susceptibility andmagnetization data were treated simultaneously during the optimization routine and resulted in J_(Mn-cr)=+0.43 cm~(-1) , _J(cr-cr)= -4.75 cm~(-1) , J_(Mn-Mn) = +1.78 cm~(-1) , g_(eff)=1.878 with the ground stateS =15/2.