Síntese e caracterização estrutural de compostos de Hg II derivados do ditelureto de bis-4-piridila

Abstract

The present work reports the syntheses and characterization of six new compounds derived from bis-4-pyridyl ditelluride (RTe)2 mercury halides HgX2 (X = Cl, Br and I). The compounds cristalized as monomers (Hg2(μ-Br)(μ- TePy)Br2(PR2R’)2), dimers ([PyTeHgI(PR2R’)]2 and [HgI2(PR2R’)]2) and polymers ([(PyTeHgI)2]n. DMF, [PyTeHg(Cl)PR2R’]n. DMF and {[PyHgCl2(PR2R’)]2Hg}n. 2DMF). The structure of the phosphine ligand and its high Tolman angle limited the growth into heterometallic clusters. The intermediate "RTeHgX" was isolated due to π-π interactions among the aromatic pyridine centers and the N-Hg bond formed, which enhanced its stabilization. The other compounds were stabilized due to bridging bounds with pyridil telurolate like compounds 2 and 3, a bridge bound containing bromine and iodinde as observed on compounds 3 and 6 and polymeric structures zigzag as found on compound 4 and linear on compound 5. The compounds were characterized by single crystal X-ray diffractometry, infrared spectroscopy.