The Reaction of the cis -ReO 2 + Core with 2-Amino-3-Methylbenzoic Acid.

The reaction of a twofold molar excess of 2-amino-3-methylbenzoic acid (H 3 amb) with cis -[ReO 2 I(PPh 3 ) 2 ] in ethanol led to the isolation and characterization of the six-coordinate [Re(amb)(OEt)I(PPh 3 ) 2 ] ( 1 ). The X-ray crystal structure of 1 illustrates that the trianionic ligand amb acts as a bidentate chelate via the doubly deprotonated amino nitrogen, which is present in 1 as an imide, and the deprotonated acetoxy oxygen. The Re=N bond length is 1.751(3) Å, and the Re=N-C angle [143.6(3)°] deviates considerably from linearity. [ABSTRACT FROM AUTHOR]