کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1309527 | 975210 | 2007 | 7 صفحه PDF | دانلود رایگان |
Two new lead(II) complexes with the ligand 4′-(4-pyridyl)-2,2′:6′,2″-terpyridine (pyterpy), [Pb(pyterpy)(MeOH)I2] · MeOH and [Pb(pyterpy)(μ-AcO)]2(ClO4)2, have been synthesized and characterized by CHN elemental analysis, 1H NMR-, 13C NMR-, IR spectroscopy and structurally analyzed by X-ray single-crystal diffraction. The thermal stabilities of these compounds were studied by thermal gravimetric (TG) and differential thermal analyses (DTA). The single crystal X-ray analyses show that the coordination number in these complexes is six with three “pyterpy” N-donor atoms and two or three of the anionic ligands. The arrangement of donor atoms in these complexes suggest a gap or hole in the coordination geometry of the lead atoms, possibly occupied by a stereoactive lone pair of electrons on lead(II) and the coordination sphere is hemidirected. The potentially tetradentate ligand 4′-(4-pyridyl)-2,2′:6′,2″-terpyridine (pyterpy) acts as a tridentate donor to Pb(II). The noncoordinated pyridyl group interacts with hydrogen atoms of adjacent molecules and forms normal hydrogen bonds in [Pb(pyterpy)(MeOH)I2] · MeOH and weak C–H⋯N interactions for [Pb(pyterpy)(μ-AcO)]2(ClO4)2, thus extending the monomeric structures into one-dimensional networks.
Two new lead(II) complexes with the ligand 4′-(4-pyridyl)-2,2′:6′,2″-terpyridine (pyterpy), [Pb(pyterpy)(MeOH)I2] · MeOH and [Pb(pyterpy)(μ-AcO)]2(ClO4)2, have been synthesized and characterized by CHN elemental analysis, 1H NMR-, 13C NMR-, IR spectroscopy and structurally analyzed by X-ray single-crystal diffraction. The thermal stabilities of these compounds were studied by thermal gravimetric (TG) and differential thermal analyses (DTA).Figure optionsDownload as PowerPoint slide
Journal: Inorganica Chimica Acta - Volume 360, Issue 11, 1 August 2007, Pages 3603–3609