Mixed-Donor and Monomeric N-Donor Adducts of Alane

Jerry L. Atwood, Kirk W. Butz, Michael G. Gardiner, Cameron Jones, George A. Koutsantonis, Colin L. Raston, Kerry D. Robinson

Research output: Contribution to journalArticlepeer-review

51 Citations (Scopus)

Abstract

Reaction of H3Al·NMe3 with 1,2-bis(dimethylphosphino)ethane (=dmpe) affords the novel mixed-donor aluminum hydride complex 2(Me3N·AlH3)-dmpe (1) with the N- and P-donor groups in apical trigonal bipyramidal positions (structurally authenticated) which has been modeled by ab initio calculations on H3N·AlH3·PMe3 and H3Al·PMe3. The complexes [H3Al·MeMorph] (2) (MeMorph = N-methylmorpholine) and H3Al·quin (3) (quin = quinuclidine) are prepared from LiAlH4 and hydrochloride salts of the appropriate amines. Complex 2 is polymeric in the solid state, displaying donation from the N- and O-centers of successive ligands, unlike 3, which is a monomer with four-coordinate metal centers and displays no reactivity toward dmpe. Crystal data (Mo Kα, λ = 0.710 69 Å): 1, monoclinic, space group P21/n, a = 6.694(2) Å, b = 24.775(6) Å, c = 7.044(2) Å, V = 1168(6) Å3, Z = 2, R = 0.097; 2, orthorhombic, space group P212121, a = 13.504(4) Å, b = 9.799(3) Å, c = 5.965(2) Å, V= 789 Å3, Z = 4, R = 0.093; 3, monoclinic, space group P21/m, a = 6.138(1) Å, b = 9.066(2) Å, c = 8.213(2) Å, V= 453.0(2) Å3, Z = 2, R = 0.056.

Original languageEnglish
Pages (from-to)3482-3487
Number of pages6
JournalInorganic Chemistry
Volume32
Issue number16
DOIs
Publication statusPublished - 1 Aug 1993
Externally publishedYes

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