Abstract

The complex [Re(NPh)(OH)(PPh 3)(tacn)] 2+ ( 1) was prepared by reacting [Re(NPh)Cl 3(PPh 3) 2] with tacn (tacn = 1,4,7-triazacyclononane) in CH 2Cl 2 and has been characterized by X-ray crystal analysis. The ReNPh distance is 1.706(10) Å and the ReNPh angle is 170.2(9)°. In acetonitrile, the cyclic voltammogram of 1 shows an irreversible reduction wave at −0.77 V assignable to the reduction of rhenium(V) to rhenium(IV). Complex 1 catalyses alkene oxidation by PhIO.

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