Search results for "ALUMINUM HYDRIDE"

The complete basis set Full-CI roto-vibrational spectroscopic constants of AlH, AlH+ and AlH -

2017

The spectroscopic constants of AlH, AlH + and AlH -, as well as their counterparts with H/D isotopic substitution, were obtained at the frozen core Full-CI/CBS limit and corrected for the core-correlation, relativistic and diagonal Born–Oppenheimer contributions, calculated by means of different high-level computational methods. On the basis of the obtained values, some accepted experimental result for these astrochemically relevant species is questioned.

Regioselective Epoxide Ring Opening. Steroselective Synthesis of a Tetrahydropyran Ring

1998

The stereoselective synthesis of a 2-substituted tetrahydropyran with adjacent alkoxy-bearing stereogenic centre is described. The key steps of this synthesis were the stereoselective epoxidation of an allylic alcohol and the regioselective epoxide ring opening by lithium aluminum hydride. The regio and stereoselective synthesis of a trihydroxyselenide and a trihydroxysulfide is also described. The latter compounds are not suitable for cyclization to tetrahydrofuran ring.

2020

Reduction of the aluminum iodide AlI2AriPr8 (1; AriPr8 = C6H-2,6-(C6H2-2,4,6-Pri3)2-3,5-Pri2) with 5% w/w Na/NaCl in hexanes gave a dark red solution from which the monomeric alanediyl :AlAriPr8 (2) was isolated in ca. 28% yield as yellow-orange crystals. Compounds 1 and 2 were characterized by X-ray crystallography, electronic and NMR spectroscopy, and theoretical calculations. The Al atom in 2 is one-coordinate, and the compound displays two absorptions in its electronic spectrum at 354 and 455 nm. It reacts with H2 under ambient conditions to give the aluminum hydride {AlH(μ-H)AriPr8}2, probably via a weakly bound dimer of 2 as an intermediate.

Über die reduktion von polyacrylsäurederivaten

1960

Bei der Reduktion von Polyacrylsaurechlorid und von Polyacrylsaure-N-methylanilid mit Lithiumaluminium-tri-tert.-butoxyhydrid bzw. Lithiumaluminiumhydrid entstehen Polymere mit 30–50 Mol-% Aldehydgruppen. Aus Polyacrylsaurechloriden, Polyacrylsauremethylestern und Polyacroleinen wurden bei der Reduktion mit Lithiumaluminiumhydrid bzw. Kaliumborhydrid identische polymere Allylalkohole erhalten. Diese lassen sich acylieren, tritylieren und tosylieren. Die Polyallyl- und Polyvinyl-dinitrobenzoate bilden mit α-Naphthylamin und Benzidin gefaurbte Molekulverbindungen. The reduction of polyacrylyl chloride and polyacryl-N-methylanilide with lithium aluminum tri-tert-butoxyhydride and lithium alumi…

Impact of Organoaluminum Compounds on Phenoxyimine Ligands in Coordinative Olefin Polymerization. A Theoretical Study

2013

The reduction of the phenoxyimine moiety in three individual species—namely free ligand, aluminum complex, and titanium complex—with aluminum alkyls and aluminum hydride has been studied by means of DFT. It was demonstrated that the free phenoxyimine ligand in an equimolar mixture with trimethylaluminum does not undergo reduction. Instead, experimentally observed formation of the six-membered cyclic aluminum–phenoxyimine complex, useful in the ring-opening polymerization of lactones, takes place as the kinetically and thermodynamically favored process. However, it is anticipated that a 2-fold excess of the aluminum compound, especially aluminum hydride, acting on the resulting cyclic comple…