Products of the reactions of sparteine-2-thione with CuBr2 in protic and aprotic solvents

► Reaction of sparteine-2-thione with CuBr2 in protic and aprotic solvents. ► Sparteine-2-thione on reaction with CuBr2 in methanol gives a three-cyclic complex. ► The reaction in acetonitrile affords a bis-sulfur-bridged Cu(II) binuclear complex.