N-Bridged and H-Bridged Aminoalanes: Single-Crystal X-ray Structure Determinations for the Planar Dimer ?(Me3Si)2N2Al(mu-H)!2 and the Puckered Four-Membered Ring Compound (Me3Si)2N(Me2N)Al(mu-NMe2)2Al(H)N(SiMe3)2
Abstract
The known bis(bis(trimethylsilyl)amino)alane ?(Me3Si)2N2Al(mu-H)!2 (1) is obtained from disproportionation of the base-stabilized monomeric bis(trimethylsilyl)aminoalane (Me3Si)2NAlH2.NMe3 in refluxing toluene. The single-crystal X-ray structure determination for 1 provides a H-bridged planar dimer with exo-cyclic N(SiMe3)2 groups. The combination of 1 with HNMe2 in a 1:1 ratio results in competing aminolysis at the Al-H site and transamination at the Al-N(SiMe3)2 site of 1, as illustrated by the molecular structure of (Me3Si)2N(Me2N)Al(mu-NMe2)2Al(H)N(SiMe3)2 (2) which is isolated from this system. The characteristic structural feature of 2 is a puckered ?Al-N-Al-N! ring with different ligands on two aluminum atoms.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 30, 1998
- Accession Number
- ADA348532
Entities
People
- A. L. Rheingold
- Ilia A Guzei
- J. F. Janik
- R. L. Wells
Organizations
- Duke University