Abstract

OLIVERA, Fiorella L.  and  SANTILLAN, Guillermo A.. Synthesis and crystal structure of two lead (II) complexes with 1,10-phenathroline ligand. Rev. Soc. Quím. Perú [online]. 2012, vol.78, n.4, pp.242-253. ISSN 1810-634X.

Two coordination complexes have been synthesized by the reaction of lead nitrate (II) with 1,10-phenanthroline in methanol/water. The crystals of these complexes were obtained by using the diffusion method and structurally characterized by X-ray single crystal diffraction. Both complexes crystallized in the monoclinic space group P2₁/c. The analysis by crystal X-ray diffraction reveals that in both complexes the coordination around the lead (II) ion is a distorted octahedral structure where the ion is bonded to the heterocyclic nitrogen atoms of chelating ligand 1,10-phenanthroline, three oxygen atoms of three nitrate groups and one oxygen from the water molecule. The difference between the complexes lies in the way of nitrate ion in presence of carboxylic acid aromatics. In addition, the crystal structure of complexes can be regarded as a 3D coordination polymer through Pb-O weak interactions, hydrogen bonds and π-π stacking interactions.

Keywords : Lead (II) complex; 1,10-phenanthroline; nitrate coordination; hydrogen bonding; - stacking interaction; coordination polymers.

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