1991
DOI: 10.1002/anie.199105641
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Abstract: The tetrameric, η5‐coordinated aluminum(I) compound [{Al(C5Me5)}4] (1) is stable at room temperature. It was prepared from AlCl and [Mg(C5Me5)2]. In this cluster, four Al atoms form a regular tetrahedron and the planes of the C5Me5 rings lie nearly parallel to the respective faces of the tetrahedron. (see also Highlight on p. 544).

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Cited by 382 publications
(268 citation statements)
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“…2. It is centered at 102.883 Mhz, corresponding to a chemical shift of about )90 ppm, which is close to the value )80.8 ppm measured in solution [23]. We remind that in Al metal, the Knight shift is 1640(10) ppm (corresponding to m % 103.07 MHz here) [24].…”
Section: Thesupporting
confidence: 81%
See 1 more Smart Citation
“…2. It is centered at 102.883 Mhz, corresponding to a chemical shift of about )90 ppm, which is close to the value )80.8 ppm measured in solution [23]. We remind that in Al metal, the Knight shift is 1640(10) ppm (corresponding to m % 103.07 MHz here) [24].…”
Section: Thesupporting
confidence: 81%
“…As will be shown below, the relaxation in Al 50 is drastically affected by hindered reorientational motions of the Cp* groups, which form a ''surface layer'' around the Al 50 cores. For comparative reasons, we also performed 27 Al NMR experiments on the related cluster compound Al 4 Cp* 4 (denoted by Al 4 ), having a much smaller metal core but with the same ligand [23].…”
Section: Introductionmentioning
confidence: 99%
“…with CO evolution). 1 (4) A yellow toluene solution (20 mL) of Ni(CO) 3 (GaL) (0.63 g, 1 mmol) was added dropwise to a solution of (10 mL) GaL (487 mg, 1 mmol). The solution was stirred for 1 day at 95°C.…”
Section: Methodsmentioning
confidence: 99%
“…The synthesis and characterization of stable organo group 13 metal (I) species dates from the early 1990s [1][2][3]. The early compounds were stabilized by g 5 -C 5 Me 5 and C(SiMe 3 ) 3 substituents.…”
Section: Introductionmentioning
confidence: 99%
“…[13][14][15][16][17] Aluminum(I) halide solutions have been used as precursors to form a variety of organoaluminum complexes such as Al 4 Recent theoretical analysis has suggested that these may also be analyzed with a modified jellium model, and that the observed organoaluminum clusters such as Al 4 Cp * 4 may represent stable magic-number forms. 18,19 This may result in hindered reactions with O 2 due both to electronic structure effects as well as the physical steric barrier of the ligands surrounding the metal core.…”
Section: Introductionmentioning
confidence: 99%