Abstract
Four new bidentate, α-amino substituted α-amine oxime ligands and their rhodium(III) complexes are reported. Characterization of the ligands and the complexes by proton NMR is included. The ligands are 3-(N-phenylamino)-3-methyl-2-butanone oxime (PhenAO), 3-[N-(2-phenylethyl)amino]-3-methyl-2-butanone oxime (PhetAO), 3-[N-(4-acetanilido)amino]-3-methyl-2-butanone oxime (acetanilidoAO) and 3-[N-(4-(N-methyl)acetanilido)amino]-3-methyl-2-butanone oxime (N-methyl acetanilidoAO). The rhodium complexes, [Rh(PhenAO) 2Cl 2], [Rh(PhetAO) 2Cl 2], [Rh(acetanilidoAO) 2Cl 2] and [Rh(N-methyl acetanilidoAO) 2Cl 2], were also characterized by single-crystal X-ray diffraction. The complexes are neutral and octahedral with coordination of two bidentate amine oxime ligands through the oxime and amine nitrogen atoms and two trans-chloride ligands. The cis-oximes in each case lose one proton and the remaining proton is involved in a strong OHO hydrogen bond. Bond distances and angles in the complexes are normal. Details of the structures (including two modifications of the first two complexes) are presented.
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