Abstract
Herein is presented the synthesis and characterization of the alkylaluminum lithium amides of the general formula [R2AlNLi(THF)(n)R']2 (where R,R' = Me, (t)Bu (n = 1) (1); (i)Bu, Ph (n = 1) (2); SiMe3, Ph (n = 2) (3)). When the relatively bulky groups Mes or Dipp (Mes = 2,4,6-trimethylphenyl, Dipp = 2,6-diisopropylphenyl) are used, the unusual adducts Me2((t)Bu)Al-NHLi(THF)3Dipp (4) and Mes2(Me)Al-NLi(THF)2(SiMe3)2 (6) and aluminate [(i)Bu2((t)Bu)AlNHDipp]-[Li(THF)4]+ (5) result. One other type of aluminate of relevance to this study is the related complexes [Mes2Al(NH(t)Bu)2]Li(THF)(n) (where n = 1 (7) and 2 (8)). Crystal data for 1: triclinic, P1, a = 9.018(2) Å, b = 9.056(1) Å, c = 9.429(2) Å, α = 109.23(1)°, β = 90.29(1)°, γ = 102.82(1)°, V = 706.4(2) Å3, Z = 2, with 1070 reflections with F > 6.0 σ(F), R = 0.0697. Crystal data for 2: monoclinic, P21/n, a = 10.584(1) Å, b = 14.469(1) Å, c = 13.599(1) Å, β = 94.40(1)°, V = 2076.4(3) Å3, Z = 4, with 1323 reflections with F > 6.0 σ(F), R = 0.0741. Crystal data for 4: monoclinic, Cc, a = 18.215(3) Å, b = 10.498(1) Å, c = 18.217(4) Å, β = 106.12(1)°, V = 3347(1) Å3, Z = 4, with 1423 reflections with F > 4.0 σ(F), R = 0.065. Crystal data for 5: monoclinic, P21/n, a = 10.262(1) Å, b = 26.899(5) Å, c = 16.687(2) Å, β = 99.72(1)°, V = 4540(1) Å3, Z = 4, with 1958 reflections with F > 6.0 σ(F), R = 0.0755. Crystal data for 7: monoclinic, P21/n, a = 17.005(2) Å, b = 10.925(2) Å, c = 17.138(2) Å, β = 95.52(1)°, V = 3169.2(8) Å3, Z = 4, with 1361 reflections with F > 6.0 σ(F), R = 0.0657. Crystal data for 8: monoclinic, Cc, a = 14.28(2) Å, b = 19.829(5) Å, c = 16.160(7) Å, β = 111.33(1)°, V = 4264(5) Å3, Z = 8, with 1172 reflections with F > 4.0 σ(F), R = 0.0933.
Original language | English |
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Pages (from-to) | 11535-11540 |
Number of pages | 6 |
Journal | Journal of the American Chemical Society |
Volume | 118 |
Issue number | 46 |
DOIs | |
State | Published - Nov 20 1996 |
ASJC Scopus subject areas
- Catalysis
- General Chemistry
- Biochemistry
- Colloid and Surface Chemistry