|
| << vorige | volgende >> |
Tijdschrift beschrijving
Alle jaargangen van het bijbehorende tijdschrift
Alle afleveringen van het bijbehorende jaargang
Alle artikelen van de bijbehorende aflevering
Details van artikel 42 van 116 gevonden artikelen
| Titel: |
GROUP 13 AMIDES. SYNTHESES AND MOLECULAR STRUCTURES OF [(i-Bu)2Al-N(H)Mes]2,[(i-Bu)Al-N(H)Ph(t-Bu)2-μ-(CMe2CH2)]2, [Me2In-N(H)Ph']2, AND [(i-Bu)2Al-N(H)Ada]2 |
| Auteur: |
Dillingham, Mary D. B. Hill, Jameica B. Lee, Baosheng Schauer, Steven J. Pennington, William T. Robinson, Gregory H. Hrncir, Duane C. |
| Verschenen in: |
Journal of coordination chemistry |
| Paginering: | Jaargang 28 (1993) nr. 3-4 pagina's 337-346 |
| Jaar: |
1993-06-01 |
| Inhoud: |
The sterically demanding Group 13 amide dimers [(i-Bu)2Al-N(H)Mes]2 (I), [(i-Bu)Al-N(H)Ph(t-Bu)2-μ-(CMe2CH2)]2 (II), [Me2In-N(H)Ph']2 (III), and [(i-Bu)2Al-N(H)Ada]2 (IV) (Ada = adamantyl; Bu=butyl; Mes = Ph(Me)3; Ph = phenyl; Ph'= 2-biphenyl) have been prepared by reaction of (i-Bu)2AIH or Me3In with the respective primary amine and characterized by 1H NMR, elemental analyses, and single crystal X-ray diffraction. I crystallizes in the triclinic space group P1 with unit cell parameters a = 9.272(1), b = 9.718(2), c = 11.585(2)Å, α = 101.76(1)°, β = 106.69(1)°, γ = 109.70(1)°, V=887.5(2)Å3, and Dcalc = 1.03g cm-3 for Z = 1. Least-squares refinement based on 1644 observed reflections with intensities I > 3σ(I) in the range 3.5 < 2θ < 45.0° converged at R = 0.043 and Rw = 0.054. II crystallizes in the monoclinic space group P21/c with unit cell parameters a = 11.292(5), b = 17.544(9), c = 11.532(5)Å, β = 107.99(4)°, V = 2173(2)Å3, and Dcalc = 1.05 g cm-3 for Z = 2. Least-squares refinement based on 1819 observed reflections with intensities I > 3σ(I) in the range 3.5 < 2θ < 45.0° converged at R = 0.066 and Rw = 0.088. III crystallizes in the triclinic space group P1 with unit cell parameters a = 9.710(1), b = 17.755(1), c = 9.109(2)Å, α = 102.27(1)°, β = 117.46(2)°, γ = 88.38(1)°, V = 1357(2)Å3, and Dcalc = 1.53 g cm-3 for Z = 2. Least-squares refinement based on 2569 observed reflections with intensities I > 3σ(I) in the range 4.0 < 2θ < 50.0° converged at R = 0.035 and Rw = 0.049. These compounds reside in trans conformations about M2N2 (M = Al or In) four-membered rings. II is an interesting metallated product. The 1H NMR spectrum of IV suggests the presence of both trans and cis isomers (in approximately a 2:1 ratio). |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 42 van 116 gevonden artikelen
| << vorige | volgende >> |