Introducing the coordination polymer of lead (II) with PbO4S environment

سال انتشار: 1398
محل انتشار: بیست و یکمین سمینار شیمی معدنی انجمن شیمی ایران
کد COI اختصاصی: IICC21_127
زبان مقاله: انگلیسی
تعداد مشاهده: 461

نویسندگان

Chemistry Department, Urmia University, ۵۷۵۶۱۵-۱۸۱۸ Urmia, Iran

چکیده

Coordination polymers have been emerging as a topical research field in crystal engineering, solid-state chemistry, and materials science and they have attracted an enormous interest among chemists due to their novel physical and chemical properties [1]. These compounds are relevant to many fields such as organic and inorganic chemistry, biochemistry, materials science, electrochemistry, and pharmacology [2]. In this work, the Pb(II) complex of 2-mercaptoethenol (L), [Pb(2-mercaptoethenol)(μ-OAc)]n, was synthesize. The compound was identified by elemental analysis, FT-IR, 1H NMR spectroscopy and single-crystal X-Ray diffraction. X-ray analysis revealed an 1D-coordination polymer extending by the acetato bridges. The complex cores on the chains are containing the lead (II) atom with rare PbO4S environment and hemidirected arrangement. In the crystal structure of complex (figure 1), the lead atom is coordinated by one OS-donor ligand and two bridging acetato ligands, O2- and O-donor, with coordination number of five. The ligand acts as bidentate NS-donor and forms a five-membered non-planar chelate ring. The dihedral angles between mean planes through the four- and five-membered chelate rings is 87.32°, confirming that the acetato and ligand have perpendicular direction to each others. In the crystal structure the polymeric chain was formed by briddging the acetato ligands with coordination mode of (O,μ-O) . In the structural network of the complex, there are C–H···O and O–H···O hydrogen bonds which are appeared between adjacent chains to extend the 1D coordination polymer into 3D.

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