Unusual stability of the coordinated triethylborohydride anion in an alkaline-earth metal complex: crystallographic characterization of [Ca(HBEt3){1,2,4-C5(SiMe3)3 H2}(thf)2]

Abstract

The triethylborohydride anion [HBEt₃]⁻ transfers intact from Na[HBEt₃] to a calcium center to form the monomeric organocalcium complex [Ca(HBEt₃){1,2,4-C₅(SiMe₃)₃ H₂}(thf)₂], which is stable in solution and the solid state; the [HBEt₃]⁻ anion is coordinated in a multidentate fashion to the metal, which likely contributes to the failure of attempts to abstract the triethylborane moiety from the compound.