Reaktionen von (Cp′AlCl2)2 und (Cp★AlCl2)2 mit alkyl- bzw. Arylalkaliverbindungen sowie lithiierten aminen: Struktur von (Cp′(Ph)AlCl)2 und [Cp′(Cl)AlN(H)tBu]2
作者:Stephan Schulz、Herbert W. Roesky、Mathias Noltemeyer、Hans-Georg Schmidt
DOI:10.1016/0022-328x(94)05347-e
日期:1995.5
(Cp'AlCl2)(2) (Cp' = Me(4)EtC(5)) and (Cp*AlCl2)(2) (Cp* = Me(5)C(5)) react with alkyl and arylalkali metal compounds under elimination of LiCl and KCl, respectively, to give the disubstituted, dimeric aluminum chlorides (Cp'RAlCl)(2). The crystal structure of [Cp'(Ph)AlCl](2) 3 has been determined from 4130 unique diffractometer-measured intensities and refined to R = 0.0431. The compound crystallizes in the triclinic space group P1 $($) over bar$$ with cell dimensions a = 9.150(3) Angstrom, b = 13.006(4) Angstrom, c = 14.350(4) Angstrom, alpha = 103.51(3)degrees, beta = 97.35(1)degrees, gamma = 103.08(1)degrees and Z = 2. The reaction of (Cp'AlCl2)(2) with lithium amides gives dimeric aminoalanes [Cp'Al(CI)N(H)R'](2). The structure of [Cp'Al(CI)N(H)(t)Bu](2) 6 has been determined by single-crystal X-ray diffraction studies. 6 crystallizes in the triclinic space group P1 $($) over bar$$ with unit cell parameters a = 8.489(3) Angstrom, b = 8.864(3) Angstrom, c = 12.225(5) Angstrom, alpha = 102.65(3)degrees, beta = 99.61(3)degrees, gamma = 107.59(2)degrees and Z = 1. Least-squares refinement based on 4327 observed reflections converged to R = 0.0430.
Low‐Coordinate Aluminum Amides from Silylanilines and Alkylalanes
作者:Manish Khandelwal、Douglas R. Powell、Rudolf J. Wehmschulte
DOI:10.1002/ejic.201000869
日期:2011.2
amides R2AlN(Ar)SiMe3 [R = Et, Ar = Dipp, 1 (Dipp = 2,6-iPr2C6H3-); R = iBu, Ar = Dipp, 2; R = Et, Ar = Mes, 3 (Mes = 2,4,6-Me3C6H2-); R = iBu, Ar = Mes, 4] were prepared by ethane or hydrogen elimination reaction between Et3Al or iBu2AlH and ArN(H)SiMe3 in refluxing hexane solution. The LiCl salt elimination route resulted in the formation of the monomeric aluminum amide Et2AlN(Mes)SiPh3 (5) featuring
铝酰胺 R2AlN(Ar)SiMe3 [R = Et, Ar = Dipp, 1 (Dipp = 2,6-iPr2C6H3-); R = iBu,Ar = Dipp,2;R = Et, Ar = Mes, 3 (Mes = 2,4,6-Me3C6H2-); R = iBu, Ar = Mes, 4] 是通过 Et3Al 或 iBu2AlH 与 ArN(H)SiMe3 在回流己烷溶液中的乙烷或氢消除反应制备的。LiCl 盐消除路线导致形成具有三配位铝和氮中心的单体铝酰胺 Et2AlN(Mes)SiPh3 (5)。此外,双核物质Ph2SiN(Mes)AlEt2}2(6)和氢化物桥连八元环化合物MesN(SiMe3)Al(iBu)(μ-H)}2(报道了 μ-LiH)(μ-iBu2AlH) (7)。所有化合物均已通过 1H 和 13C1H} NMR 光谱表征,并且化合物 5、6 和 7 也已通过单晶
BiPh3—A convenient synthon for heavy alkaline-earth metal amides
作者:Miriam M. Gillett-Kunnath、Jonathan G. MacLellan、Craig M. Forsyth、Philip C. Andrews、Glen B. Deacon、Karin Ruhlandt-Senge
DOI:10.1039/b806948d
日期:——
Environmentally friendly, commercially available BiPh3 reacts with heavy alkaline-earth metals (Ae) and bulky trimethylsilylamines to give the corresponding amides [AeN(SiMe3)(R)}2(thf)n] (R = SiMe3, 2,4,6-Me3C6H2, 2,6-iPr2C6H3) in good yields, providing proof of concept for a general synthetic method.
Insight into One-Electron Oxidation of the {Fe(NO)<sub>2</sub>}<sup>9</sup> Dinitrosyl Iron Complex (DNIC): Aminyl Radical Stabilized by [Fe(NO)<sub>2</sub>] Motif
addition to IR, EPR (g ≈ 2.03 for Fe(NO)2}9), single-crystal X-ray structure (Fe–N(O) and N–O bond distances), and Fe K-edge pre-edge energy (7113.1–7113.3 eV for Fe(NO)2}10 vs 7113.4–7113.9 eV for Fe(NO)2}9), the 15N NMR spectrum of [Fe(15NO)2] was also explored to serve as an efficient tool to characterize and discriminate Fe(NO)2}9 (δ 23.1–76.1 ppm) and Fe(NO)2}10 (δ −7.8–25.0 ppm) DNICs. To
Reactivity of the Bicyclic Amido‐Substituted Silicon(I) Ring Compound Si
<sub>4</sub>
{N(SiMe
<sub>3</sub>
)Mes}
<sub>4</sub>
with FLP‐Type Character
作者:Kevin Schwedtmann、Michael Quest、Benedikt J. Guddorf、Jan Keuter、Alexander Hepp、Milica Feldt、Jörn Droste、Michael Ryan Hansen、Felicitas Lips
DOI:10.1002/chem.202103101
日期:2021.12.9
An amido-substituted bicyclic silicon(I) ring compound 2 Si4N(SiMe3)Mes}4 with FLP-type character forms adducts with the carbene NHC and with AlBr3. The NHC adduct (3) further coordinates to BH3. Compound 2 displays a very weak Lewis acidic and a strong Lewis basic site. This is confirmed by reaction with Brookharts acid to yield 7. With diphenylacetylene at 111 °C, formal fragmentation into a silylene
具有FLP型特征的酰胺基取代的双环硅(I)环化合物2 Si 4 N(SiMe 3 )Mes} 4与卡宾NHC形成加合物 和AlBr 3 。 NHC加合物( 3 )进一步与BH 3配位。化合物2显示出非常弱的路易斯酸性位点和强路易斯碱性位点。这通过与Brookharts酸反应得到7得到证实。当二苯乙炔在 111 °C 时,会正式裂解成亚硅基和三硅杂环丙烯亚基。两者都被炔烃捕获以提供8和9 。