Coordination modes of 3-aminosalicylic and 3-hydroxyanthranilic acids in palladium(II), platinum(II) and rhenium(V) complexes. The crystal structure of cis-[Pt(HsalNH)(PPh3)2] · 0.25C2H5OH

New Pd(II), Pt(II) and Re(V) complexes of 3-aminosalicylic acid (H2salNH2) and 3-hydroxyantranilic acid (HantOH) have been prepared, cis-[Pt (HsalNH)(PPh3)2] ·  0.25C2H5OH (1), trans-[PdCl(salNH2)(PPh3)2] (2), trans-[ReOI2(HsalNH2)(PPh3)] · (CH3)2CO (3), cis-[Pt(HantO)(PPh3)2] (4), trans-[PdCl(antOH)(PPh3)2] · 4H2O (5), [PdCl(antOH)(bipy)] · C2H5OH (6), [PdCl2(HantOH)2] (7) and trans-[ReOI(HantO)(PPh3)2] · (CH3)2CO (8). The crystal structure of complex 1 was determined showing chelation of HsalNH2− through the adjacent nitrogen and oxygen atoms of the amino and phenolate groups. Infrared and 1H NMR spectroscopic data for the complexes are presented.

A comparative study was performed on the coordination modes of Pd(II), Pt(II) and Re(V) in complexes with 3-aminosalicylic and 3-hydroxyantranilic acids. The crystal structure of the Pt(II) complex with 3-aminosalicylic acid shows coordination through the nitrogen and oxygen atoms of the amino and phenolate groups (N,O-chelating mode), respectively.Figure optionsDownload as PowerPoint slide