Kristallisiertes Natrium‐triethylhydroborat — Bildung und Charakterisierung

Abstract

Crystalline Sodium Triethylhydroborate — Formation and Characterization Two equiv. of NaHBEt3 (1) and one equiv. of mesitylene form a crystalline compound, which is characterized by DSC and by a single‐crystal X‐ray structure analysis at 190 K as the solid phase 2.

Triply Bonded Nb24+Tetragonal Lantern Compounds: Some Accompanied by Novel B−H···Na+Interactions

“…The crystallographic features of the Et 3 BHanion resemble those found in a study of the structure of (NaEt 3 BH‚ mesitylene) 4 . 26 Similarly, the infrared spectroscopic spectra, shown in Figure 5, agree with the solid state formulation. The strong bands centered at 1919 and 1948 cm -1 found in the spectra of 1‚2NaEt 3 BH and 1‚NaEt 3 BH, respectively, correspond to B-H stretching vibrations.…”

“…The crystallographic features of the Et 3 BH - anion resemble those found in a study of the structure of (NaEt 3 BH· mesitylene) 4 , agree with the solid state formulation.…”

Trialkylboron/Lanthanide Metallocene Hydride Chemistry: Polydentate Bridging of (HBEt3)- to Lanthanum

“…Although the relative amount of interaction with lanthanum of the hydrogen substituents versus the carbon atoms is difficult to estimate, the formula for 1 in the solid state could be written as (C 5 Me 5 ) 2 La(μ-H)[(μ-H)CHMe] 2 BEt to reflect the directed orientation of the hydrogen atoms. Alkylborohydrides have been observed to use alkyl hydrogen atoms to bridge to alkali metals, − alkaline-earth metals, scandium, and zirconium but not to metals as large as lanthanum to our knowledge. For example, a similar mode of coordination for the (HBEt 3 ) - ligand in 1 has been observed for lithium in (DMPE) 2 H 3 Ta(μ-H) 2 Li(HBEt 3 ) 34 and scandium in [CH(CMeNAr) 2 ]Sc(NHAr)(HBEt 3 ) …”

Metal‐Hydride Bonding in Higher Alkali Metal Boron Monohydrides

“…[23] Meanwhile, we are aware of only a single report of a four-membered Na 2 H 2 array; the mesitylene adduct {(η 6 -Me 3 C 6 H 3 )Na(µ-Et 3 BH)Na(µ-Et 3 BH)} 2 revealing a similar central metallocycle [H-Na 2.30(7) Å, 2.23(4) Å] based on pyramidalized hydride centers. [24] Scheme 4. The treatment of potassium triethylborohydride with TMEDA in hydrocarbon solvent has, like the analogous sodium system, been shown by 1 H NMR spectroscopy to yield an empirically mono-solvated product.…”