Anhydrous tetranuclear, dinuclear, and dimeric lanthanide complexes bearing tetradentate Schiff bases |
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| Authors: | Steven A Schuetz |
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| Institution: | Department of Chemistry, University of Nebraska - Lincoln, Hamilton Hall, Lincoln, NE 68588-0304, USA |
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| Abstract: | This contribution describes the synthesis and complete characterization of dinuclear (Ln2(SB)3) and rigorously dimeric ((SB)Ln(N(TMS)2)]2) lanthanide complexes bearing “saturated” tetradentate Schiff bases (SB). The molecular connectivities, nuclearity, and metal ion coordination geometries in these compounds are governed by the interplay of Schiff-base steric requirements, metal ion radius, and reaction conditions (i.e., solvent choice, concentration, and temperature); the impact of these factors will be discussed and emphasized in the context of structural similarities and notable intramolecular interactions within these related compounds. Also presented is a tetranuclear Nd3+ complex exhibiting a ladder arrangement of metal ions and μ-oxo bridges; its formation occurs by the destruction of THF at elevated temperatures. All the compounds presented can be reproducibly synthesized in high yields and analytical purity. |
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| Keywords: | Lanthanides Schiff-base Anhydrous Dinuclear Dimeric Tetranuclear |
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