کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1335571 | 1500276 | 2013 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Synthesis and structural characterization of alkaline–earth complexes containing a triazole-based selenide ligand Synthesis and structural characterization of alkaline–earth complexes containing a triazole-based selenide ligand](/preview/png/1335571.png)
The alkaline–earth metal complexes, [MI{4,5-(P(Se)Ph2)2tz}]2(thf)n [M = Mg, n = 2 (2); M = Ca, n = 4 (3); M = Sr, n = 6 (4); M = Ba, n = 7 (5); tz = 1,2,3-triazole], [Mg{4,5-(P(Se)Ph2)2tz}2(thf)4] (6) and [M{4,5-(P(Se)Ph2)2tz}2(thf)]2 (M = Ca (7), Sr (8), Ba (9), were prepared by metathesis reactions between [Na{4,5-(P(Se)Ph2)2tz}] and MI2 (M = Mg, Ca, Sr, Ba) in different molar ratios. The structural arrangements observed in 2–5 and 7–9 include bimetallic species comprising inorganic M2N4 rings, while the geometrical array present in the ligands in these systems enables M–Se bonding. In addition, easy hydration of complexes 3 and 8 by adventitious water during their crystallization gave the ionic complex [{Ca{4,5-(P(O)Ph2)(P(Se)Ph2)tz}(thf)2(H2O)}2]2+ 2[I]− (3a) and the hydrate complex [Sr{4,5-(P(Se)Ph2tz)2}2(thf)(H2O)0.21]2 (8a), respectively. Complex 3a is formed by the almost complete hydrolysis of the Ca–Se(P) bonds and the displacement of the iodine atoms by water molecules in the coordination sphere of the metal, while 8a exhibits only partial coordination of water molecules to the strontium atoms leaving the Sr–Se bonds intact.
Alkaline-earth metal complexes were prepared by metathesis reactions between [Na{4,5-(P(Se)Ph2)2tz}] and MI2 (M = Mg, Ca, Sr, Ba) in different molar ratios. The structural arrangements include bimetallic species comprising inorganic M2N4 rings, which enable M–Se bonding.Figure optionsDownload as PowerPoint slide
Journal: Polyhedron - Volume 63, 31 October 2013, Pages 167–172