Transfer of Amide and 2-Methoxyethoxy Groups and Sodium Encapsulation in the Reaction of TaCl3[N(TMS)(2)](2) with Sodium Bis(2-methoxyethoxy)aluminum Hydride: X-ray Structure of [NaAl{N(TMS)(2)}(OCH2CH2OMe)(3)](2)

摘要

The reaction between the tantalum compound TaCl3[N(TMS)(2)](2) and the hydridic reducing agent sodium bis(2-methoxyethoxy) aluminum hydride (Vitride) has been investigated in toluene solution at room temperature and found to afford the dimeric aluminate complex [NaAl{N(TMS)(2)}(OCH2CH2OMe)(3)](2) as the sole isolable product. The molecular structure of the product establishes the existence of a four-coordinate aluminum atom and the formal transfer of the 2-methoxyethoxy and bis(trimethylsilyl) amide groups to the aluminate product. The aggregation of two NaAl{N(TMS)(2)}(OCH2CH2OMe)(3) units serves to bind the two sodium cations in a crown-ether fashion through six ancillary oxygen atoms.