Structural Variety of Alkali Metal Compounds Containing P−E−M (E = S, Se; M = Li, Na, K) Units Derived from Nitrogen Rich Heterocycles

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• 作者：Jhon A. Balanta-Daz ; Mnica Moya-Cabrera ; Vojtech Jancik ; Leslie W. Pineda-Cedeo ; Rubn A. Toscano ; Raymundo Cea-Olivares*
• 刊名：Inorganic Chemistry
• 出版年：2009
• 出版时间：March 16, 2009
• 年：2009
• 卷：48
• 期：6
• 页码：2518-2525
• 全文大小：350K
• 年卷期：v.48,no.6(March 16, 2009)
• ISSN：1520-510X

文摘

The preparation of novel alkali metal chalcogenides supported by multidentate nitrogen rich ligands is reported. Treatment of the ligand precursors [H{(4,5-(P(E)Ph₂)₂tz}] (E = S (1a), Se (1b)) with organolithium reagents or elemental sodium and potassium in tetrahydrofuran (THF) leads to the isolation of 2−7 in high yields. These compounds were characterized by elemental analysis, IR spectroscopy, mass spectrometry, solution and solid-state multinuclear NMR spectroscopy, and single crystal X-ray diffraction analysis. In the solid state, 2, 4, and 5 are dimers that contain bimetallic six-membered (M₂N₄) rings (M = Li, Na). In 3, the discrete monomer [Li{4,5-(P(Se)Ph₂)₂tz}(thf)₂] (tz = 1,2,3-triazole) contains a five-membered CPSeLiN ring which adopts an envelope conformation. The polymeric arrangement [K{4,5-(P(S)Ph₂)₂}tz]_∞ in 6 displays different bonding modes based on the hapticity of the ligand upon binding to the potassium atom. In compounds 2−6, the presence of secondary bonding features the alkali metal chalcogen bonds.