Neutral and Cationic Methylaluminium Complexes of 2‐Anilinotropone Ligands: Synthesis, Characterization, and Reactivity toward Ethylene

Abstract

Some new aluminium complexes bearing bidentate monoanionic 2-anilinotroponate ligands have been synthesized and characterized. Reaction of 2-(2,6-diisopropylanilino)tropone or 2-(perfluoroanilino)tropone with AlMe 3 (1 equiv.) gave, by methane elimination, compounds [2-(2,6-diisopropylanilino)tropone]AlMe 2 (1) and [2-(perfluoroanilino)-tropone]AlMe 2 (2), respectively, as yellow solids. Reaction of 1 with 1 equiv. of the ligand furnished, by protodealumination of a second Al−CH 3 bond, the [2-(2,6-diisopropylanilino)tropone] 2 AlMe derivative 3. The structure of 3 has been

A clothes-peg-shaped binucleartrans-bis(2-aminotroponato)palladium(II) complex bearing pentamethylene spacers

“…A variety of 2-aminotroponate complexes, ML 2 and MLX (L is 2-aminotroponate), with metal centres such as Ni II (Jenkins & Brookhart, 2004), Ca II (Datta et al, 2007), Ti IV (Mazzeo et al, 2005), Al III (Pappalardo et al, 2004), Zn II (Meyer et al, 2006;Jin et al, 2010), Au I (Meiners et al, 2007), Rh I (Steyl, 2007) and Cu II (Mori et al, 2005;Nishinaga et al, 2010;Steyl et al, 2010), have been extensively studied for the development of functional materials that exhibit catalytic activity for molecular transformation, luminescence, magnetic properties and liquid-crystalline behaviour.…”

Ring-opening polymerization of rac-lactide using anilinotropone-based aluminum complexes-sidearm effect on the catalysis

“…Therefore, we are not able to determine whether such a dimer structure plays any role during polymerization. resonance structure based on crystallography data, and based on the reported nickel, titanium and aluminum structures in literature [25][26][27][28], the first structure is used in this paper. Scheme 4.…”

“…(2-phenylanilino)tropone [36], complex 2 [28] and complex A [16] were prepared according to literature procedure. All other reagents were purchased from commercial sources and used without purification.…”

“…Later on, Mazzeo et al reported the synthesis and olefin polymerization study of two anilinotropone-based titanium complexes (Scheme 2, D) [27]. The same group also prepared two aluminum complexes using the same two ligands (Scheme 2, E), and studied their performance in ethylene polymerization [28].…”

N,N′ and N,O chelated phosphenium cations containing aminotroponiminate or aminotroponate units

“…By contrast, aminotroponates ([AT] À ), which may formally be considered as a combination of amido and carbonyl donors, have been much less investigated. Only a few aminotroponate complexes of main-group [7] and transition-metals [8] are known. However, in both cases the coordination chemistry of these ligands remains totally unexplored for …”