The crystal structure of [Pb(sac)2ophen(H2O)2] (sac = saccharinate anion; ophen = 1,10‐phenanthroline) has been solved by single X‐ray diffractometry. It crystallizes in the monoclinic space group C2/c with Z = 4. The PbII atom presents the coordination number eight with unusual coordination of the ligand atoms between square‐antiprism and dodecahedron. The saccharinate anion acts as a bidentate ligand. The i. r. spectrum of the complex has been analyzed in detail and assigned on the basis of the structural peculiarities.
The infrared and Raman spectra of 5-chloro-7-iodo-8-hydroxyquinoline (clioquinol, CQ) and that of its Cu(II) complex of stoichiometry [Cu(CQ) 2 ] were recorded and briefly discussed. Some comparisons were made with related complexes. The interest of the investigated systems in relation to Alzheimer's disease is briefly commented.
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