The preparation and characterization of tetraneopentyl tetraaluminum(4)

Schram, E. P.; Sudha, N.

doi:10.1016/s0020-1693(00)83017-0

Cited by 29 publications

(8 citation statements)

References 13 publications

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“…A rise in temperature can increase the size of cluster and vice versa. For example, AlCl solution when treated with LiN(SiMe 3 ) 2 at 27 uC, room temperature, and 60 uC yields the metalloids [Al 7 {N(SiMe 3 ) 2 } 6 ] 2 (1), 13 [Al 12 {N(SiMe 3 ) 2 } 6 ] 2 (2), 14 and [Al 69 {N(SiMe 3 ) 2 } 18 ] 32 (3), 15 respectively, whereas the reaction of t-BuLi with AlCl solution followed by reduction with Na/K alloy results in stable radical [t-BuAl] 6 ? (4).…”

Section: Chemistry Of Aluminium(i) Compoundsmentioning

confidence: 99%

Chemistry of aluminium(i)

2005

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In this article, we discuss the synthesis of tetrameric and monomeric aluminium(I) compounds. These compounds are prepared by reduction of the respective Al-X (X = halide) bond containing precursor. The tetrameric aluminium(I) compounds are synthesized by using sterically bulky ligands whereas a stable monomeric aluminium(I) compound is obtained using a monovalent chelating ligand. Theoretical studies are carried out on the monomer to understand the Lewis basicity. The presence of a lone pair of electrons plays an important role in the preparation of aluminium containing heterocyclic compounds, main group-main group and transition metal-main group compounds having donor-acceptor bonds by carrying out reactions with unsaturated compounds and Lewis acids.

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Section: Chemistry Of Aluminium(i) Compoundsmentioning

confidence: 99%

Chemistry of aluminium(i)

2005

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“…Noteworthy for the synthesis of 18 is that Np 2 AlCl was synthesised from a modified solvothermal procedure, [55] and also mechanochemically using a common shaker mill and LiCl as milling medium.…”

Section: Resultsmentioning

confidence: 99%

“…[42a] Np 2 AlCl (bis(neopentyl)aluminium chloride) was synthesised based on a modified literature procedure. [55] A mixture of AlCl 3 (97 mg, 0.73 mmol, 1 eq.) and Np 3 Al (350 mg, 1.5 mmol, 2 eq.)…”

Section: Synthesesmentioning

confidence: 99%

Amino−Organolithium Compounds and their Aggregation for the Synthesis of Amino−Organoaluminium Compounds

et al. 2021

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Here, we present a thorough structural study of small, easily accessible aminoÀ organolithium compounds with bridging phenyl and naphthyl moieties. Their crystal structures most likely represent their aggregation as tetramers and dimers in both hydrocarbon and ethereal solvents. These aminoÀ organolithium compounds were further used to generate their corresponding aluminium compounds as a model system. Their crystal structures are reported too. All structures are discussed with a focus on the different steric demands and bridging moieties. Additionally, the crystal structures of neophyllithium and decomposition products of some of the compounds mentioned above are reported. This study provides additional data for the future design and synthesis of amine stabilised organolithium and -aluminium compounds.

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“…Recently, an octahedral pseudohexameric structure was observed also for the gallium compound GaCsMes [6] which, similarly to the corresponding indium compound, has only weak Ga-Ga interactions and very long Ga-Ga distances of 412 pm. In contrast to the InC 5 Me 5 or GaCsMes compounds cited above, (AlCsMes^ [abbreviated below as (AlCp*),»] showed a tetrahedral arrangement of four aluminium atoms with short Al-Al distances of 276.9 pm [8], which were only slightly longer than typical Al-Al single bonds (<266 pm) [9], An alkylaluminium(I) derivative was obtained by Schräm et al with tetraneopentyl tetraalane (4) [10], which, however, was not characterized up to now by a structure determination. One of the first of these clusters was obtained by the group of Schnöckel by the treatment of metastable aluminiummonochloride with pentamethylcyclopentadienyl magnesium.…”

Section: W Uhlmentioning

confidence: 99%

Synthesis and Reactivity Tetrahedral Clusters Containing of the Monovalent Elements Aluminium, Gallium, Indium, and Thallium

Uhl¹

1998

Reviews in Inorganic Chemistry

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Cluster compounds of the monovalent elements aluminium, gallium, indium, and thallium with strong bonding element-element interactions are known in literature only since about eight years, and since that time the investigation of their syntheses and physical as well as chemical properties is a rapidly growing field in current organoelement chemistry, which already yielded some remarkable and unprecedented results. The syntheses of those element© derivatives succeeded by disproportionation reactions starting with compounds of the corresponding bivalent elements, by the reaction of element© halides or cydopentadienides with, for instance, organolithium derivatives, and by the reduction of organoelement compounds of the trivalent elements. Usually, they are tetrameric in the solid state with a more or less distorted tetrahedral arrangement of the monovalent atoms. But there is a remarkable tendency of some of these compounds to dissociate in the gas phase or in dilute solutions and to form monomelic fragments, which exhibit a strong coordinative and electronic unsaturation. These organoelement© compounds show a singular chemical reactivity. Their complete oxidation by treatment with chalcogens gave heterocubane type molecules, partial oxidation with sulfur or reactions with phosphorous gave electron deficient cluster or cage molecules with a fascinating bonding situation. The monomers can be trapped by cycloaddition reactions. They are similar to carbon monoxide and can replace CO in transition metal carbonyl complexes, which opens the route to the formation of novel complexes containing transition metals and elements of the third main group. 1. INTRODUCTION The chemistry of the monovalent elements aluminium, gallium, indium, and thallium has long been restricted to inorganic derivatives like thal-lium© halides or mixed valence species like Ga[GaBr 4 ] 4 [1], Organoelement compounds containing the monovalent elements were firstly obtained for the heavier elements indium and thallium by using cyclopentadienyl groups, which generally were coordinated in a pentahapto fashion. Depending on the steric demand of the ligands, a fascinating structural chemistry was observed. One-dimensional coordination polymers with bridging cyclopentadienyl groups were formed by small ligands like C5H5 240 Brought to you by | Purdue University Libraries

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The preparation and characterization of tetraneopentyl tetraaluminum(4)

Cited by 29 publications

References 13 publications

Chemistry of aluminium(i)

Chemistry of aluminium(i)

Amino−Organolithium Compounds and their Aggregation for the Synthesis of Amino−Organoaluminium Compounds

Synthesis and Reactivity Tetrahedral Clusters Containing of the Monovalent Elements Aluminium, Gallium, Indium, and Thallium

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