| Title
| - Synthesis of Group 1 Metal 2,6-Diphenylphenoxide Complexes[M(OC6H3Ph2-2,6)] (M = Li, Na, K, Rb, Cs) and Structures of theSolvent-Free Complexes [Rb(OC6H3Ph2-2,6)]x and [Cs(OC6H3Ph2-2,6)]x: One-Dimensional Extended Arrays of Metal Aryloxides
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| Abstract
| - Reaction of 2,6-diphenylphenol (HOC6H3Ph2-2,6) with nBuLi, NaH, KH, or Rb or Cs metal in benzene gives thesolvent-free complexes [M(OAr)]x in excellent yield. The complex [Rb(OC6H3Ph2-2,6)]x exhibits a ladderlike structurein the solid state with triply bridging oxygen atoms and Rb−O distances of 2.743(3), 2.930(2), and 2.973(2) Å. TheRb cations interact with the π-electron cloud of the arene moieties, giving rise to a high Rb coordination number.The cesium-containing congener forms a layered, columnlike structure consisting of [Cs2(μ2-OAr)2] units, with nearlyidentical Cs−O distances of 2.945(2) and 2.947(2) Å. The individual layers are held together solely by Cs−areneπ-interactions.
- The solvent-free, alkali metal aryloxide complexes [M(OC6H3Ph2-2,6)]x (OC6H3Ph2-2,6 = 2,6-diphenylphenoxide; M = Li, Na, K, Rb, Cs) have been prepared, and the solid-state structures of [Rb(OC6H3Ph2-2,6)]x and [Cs(OC6H3Ph2-2,6)]x have been determined. These species both form infinite one-dimensional arrays; the rubidium-containing species forms a ladderlike structure, while the cesium-containing congener forms a layered structure of dimeric species held together by η6-arene π-interactions.
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