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Lipophilic lithium alkoxides or dialkylboroxides; X-ray structures of [Li(µ-OR′)]<sub>2</sub>and Li(OBR<sub>2</sub>)(tmeda), [tmeda =(Me<sub>2</sub>NCH<sub>2</sub>)<sub>2</sub>, R = CH(SiMe<sub>3</sub>)<sub>2</sub>, R′= CBu<sup>t</sup><sub>3</sub>or BR<sub>2</sub>]
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1989
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Inorganic ChemistryChemical EngineeringX-ray StructuresEngineeringBiochemistryX-ray DataNatural SciencesCoordination ComplexStructure ElucidationLipophilic Lithium AlkoxidesMain Group ChemistryChemistryRelated Lio CompoundsCrystallographyInorganic SynthesisLibun YieldsInorganic Compound
Treatment of But3COH or BR2OH [R = CH(SiMe3)2] with LiBun yields the colourless crystalline [Li(µ-OR′)]2, [R′= CBut3(1) or BR2(2)]; the dialkylboroxide (2) reacts with tmeda [tmeda =(Me2NCH2)2], MeCOCI, or [Ti(η-C5H5)2Cl2] to yield Li(OBR2)(tmeda)(3), BR2OH, or [Ti(η-C5H5)2(Cl)(OBR2)], respectively; X-ray data on complexes (1)–(3) are compared with those for related LiO compounds, the two-co-ordinate lithium environment in (1) and (2), and the exceedingly short Li–O [1.677(5)Å] and O–B [1.308(8)Å] distances in (3) being noteworthy.