Synthesis, molecular structure, and NMR spectra of trimesitylaluminum, a novel molecule with three coordinate aluminum

Ultra‐wideline 27Al NMR Investigation of Three‐ and Five‐Coordinate Aluminum Environments

“…By using calculated hydrogen Table S2). The crystal structure of AlMes 3 has been determined by Jerius et al, [60] but there are some ambiguities between the paper and the Cambridge Structural Database as to the position of the aluminum atom (that is, the latter notes that the z coordinate for the Al atom should be 0.3894 and not 0.3394 as reported in the paper). However, this change moves the Al atom to a position that causes the structure to be trigonal planar to slightly pyramidal.…”

“…The AlMes 3 spectrum (Figure 6 a) is similar to that previously observed in solution and solid-state NMR experiments. [60] Whereas three distinct peaks are observed in the aromatic region of the 13 (Figure 6 b) has resonances at 6.95 and 7.41 ppm, which correspond to the nonequivalent methyl groups of the silyl ligands.…”

Crystal structure of [2,6-bis(adamantan-1-yl)-4-tert-butylphenolato-κO]dimethylaluminium(III)

“…For applications of aluminium alkyl compounds in catalysis for ring-opening polymerization of cyclic esters, see: Liu et al (2001). For related structures with three-coordinate aluminium, see: Jerius et al (1986); Klis et al (2011 Data collection: SMART (Bruker, 2004); cell refinement: SAINT (Bruker, 2004); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: publCIF (Westrip, 2010).…”

Triphenyl(tetrahydrofuran)aluminium(III)

“…For synthesis of monomeric triarylaluminium complexes, two synthetic strategies were used. The first route employed a reaction of dimesitylmercury with Al/HgCl 2 , furnishing threecoordinate trimesitylaluminium (Jerius et al, 1986) which possesses a trigonal planar structure. The second synthetic route used a strategy of providing an additional neutral ligand, such as tetrahydrofuran (THF) or diethyl ether (OEt 2 ), giving four-coordinate monomeric AlAr 3 (L) complexes (L = THF or OEt 2 ) (Barber et al, 1982;De Mel & Oliver, 1989).…”