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.

Graphical abstractA 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 full-size imageDownload as PowerPoint slide