Molecular structure of bis(N-phenylsalicylideneiminato)aluminium-di(μ-isopropoxy)di(isopropoxo)aluminium(iii) and its reactions with alkoxyalkanols

Grafting aluminum(III) 8-hydroxyquinoline derivatives on MCM-41 mesoporous silica for tuning of the light emitting color

“…The 27 Al NMR spectra of solutions 1, 2, 3 and 4 ( Fig. 1) 27 Al NMR chemical shifts for those species are consistent with four-and six-coordinated aluminum [40,41], and they can be attributed to the equilibrium of four-and six-coordinated species. Dissociation of Al-N bonds in solution and formation of four-coordinated aluminum has also been observed for [Al(C 9 H 6 NO) 2 (l-OCH 2 CH 2 OR)] 2 and [(CH 3 COCH-COCH 3 )Al(l-OPr i )(C 9 H 6 NO)] 2 [35,42].…”

Aluminum five‐ and six‐coordination in bis(acetylacetonato)aminoalkoxides

“…The broad band at 3650 cm −1 due to OH group of aminoalcohols disappeared in the spectra of 2-9, suggesting the [10]. In 2-9, the absence of a band at 1720 cm −1 (due to the carbonyl stretching frequency of free acetylacetone) and the presence of strong bands in the range 1600-1608 and 1518-1528 cm −1 due to νC O and νC C stretching vibrations of the acetylacetone moiety suggest the bidentate chelating nature of the ligand.…”

“…The carbon attached to the nitrogen atom is slightly deshielded as compared to that in the free aminoalcohols [10][11][12], supporting the bidentate nature of the aminoalkanolate moiety. The signals due to the methyl carbon atoms of the terminal and the bridging isopropoxy groups appeared at δ 25.21-26.44 and δ 25.13-27.11 ppm, respectively, while the methine carbons of the terminal and the bridging isopropoxy groups appeared at δ 61.09-61.32 and δ 63.96-71.70 ppm, respectively, …”

“…2 (1) involving the presence of both fourand six-coordinated aluminum(III) atoms. The replacement of the two terminal isopropoxy groups by chelating/sterically demanding ligands leads to products depicting similar unsymmetrical structures [4][5][6][7][8][9][10]. We report herein the synthesis and characterization of some novel heteroleptic derivatives of aluminum(III) by the reactions of 1 with a variety of aminoalcohols.…”

Synthesis and structural characterization of some binuclear acetylacetone and Schiff’s base complexes containing aluminum(III) atoms in different coordination states

“…The understanding of the structural chemistry of aluminum(III) alkoxides (Bradley et al, 2001) and their derivatives (Dhammani et al, 1995(Dhammani et al, , 1996(Dhammani et al, , 1998Bohra et al, 2001;Sharma et al, 2001Sharma et al, , 2002Sharma et al, , 2003aNagar et al, 2002aNagar et al, ,b, 2003 has been quite fascinating. Aluminum(III) isopropoxide shows varying degrees of molecular association, initially dimeric vapors distill to a liquid, a trimeric species [Al(OPr i ) 3 ] 3 , which crystallizes into a stable tetrameric form [Al(OPr i ) 3 ] 4 .…”