29868-77-7Relevant academic research and scientific papers
The reactions of dialkylgallium hydrides with tert-butylethynylbenzenes - A systematic investigation into the course of hydrogallation reactions
Uhl, Werner,Claesener, Michael,Haddadpour, Sima,Jasper, Beate,Hepp, Alexander
, p. 417 - 423 (2008/01/27)
The reactions of bis- and tris(tert-butylethynyl)benzenes with dialkylgallium hydrides afforded two different types of products. 1,4-Di(tert-butylethynyl)benzene and dialkylgallium hydrides R2GaH bearing relatively small substituents (R = Et, nPr) gave the expected addition products with each CC triple bond inserted into a Ga-H bond. The intact GaR 2 groups are attached to those carbon atoms which are in α-position to the benzene rings, and intermolecular Ga-C interactions led to the formation of one-dimensional coordination polymers. In contrast secondary reactions with the release of the corresponding trialkylgallium derivatives GaR3 (R = Et, nPr, iPr, CH2tBu, tBu) were observed for all hydrogallation reactions involving the trisalkyne 1,3,5-tris(tert-butylethynyl) benzene. A similar reaction was observed upon treatment of the 1,4-bisalkyne with a dialkylgallium hydride bearing a relatively bulky substituent (R = neopentyl). Cyclophane type molecules are formed in all these cases with two or three gallium atoms in the bridging positions between both benzene rings. The Royal Society of Chemistry.
Preparation of organometal compounds
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Page 6, (2008/06/13)
A method of preparing organometal compounds that does not use oxygenated solvents is provided. The compounds produced by such method are particularly useful as precursor compounds for metalorganic chemical vapor deposition processes used in the manufacture of electronic devices. Methods of depositing metal films using such organometal compounds are also provided.
A simple synthesis of non-solvated galliumtrialkyls
Zakharkin,Gavrilenko,Fatyushina
, p. 379 - 380 (2007/10/03)
A simple synthesis of non-solvated galliumtrialkyls is proposed based on the reaction of alkyl iodides with a mixture or an alloy of magnesium and gallium in the absence of a solvent or in aliphatic hydrocarbons.
Preparation of organogallium compounds from organolithium reagents and gallium chloride. Infrared, magnetic resonance, and mass spectral studies of alkylgallium compounds
Kovar, Roger A.,Derr, Henry,Brandau, Duane,Callaway, John Owen
, p. 2809 - 2814 (2007/10/06)
Conditions for the preparation of a series of base-free trialkylgallium compounds in benzene solvent by the exchange reaction of alkyllithium compounds and gallium chloride are described. Optimum conditions which favor formation of the trialkyl involve mixing a benzene solution of an appropriate alkyllithium compound and a benzene solution of gallium chloride in exactly a 3:1 molar ratio, heating of the reaction mixture for 12 hr at 70°, filtration to remove by-product lithium chloride, removal of solvent under vacuum, and vacuum distillation of the product: 3RLi + GaCl3 = 3LiCl + R3Ga, where R = C2H5, n-C3H7, n-C4H9, i-C4H9, s-C4H9, and t-C4H9. Alkylgallium dichlorides and dialkylgallium chlorides are produced when lithium alkyls and gallium chloride are allowed to react in a 1:1 and 2:1 molar ratio, respectively: nRLi + GaCl3 = nLiCl + RnGaCl3-n, where n = 1 and 2. Reaction of an alkyllithium compound and gallium chloride in a molar ratio in excess of 3:1 results in formation of the corresponding lithium tetraalkylgallate: 4n-C3H7Li + GaCl3 = 3LiCl + LiGa(n-C3H7)4. Trivinylgallium tetrahydrofuranate is produced by the reaction of vinyllithium and gallium chloride in 3:1 molar ratio in tetrahydrofuran solvent. Infrared, proton magnetic resonance, and mass spectra of RnGaCl3-n compounds where R = C2H5 to C4H9 isomers and n = 1-3 are reported and discussed. Proton magnetic resonance spectra reveal that the chemical shifts for protons on α-carbon atoms are sensitive to substitution on the gallium. An explanation for these chemical shift data along with molecular association data for RnGaCl3-n. compounds is given. Mass spectroscopy can be used as a convenient, diagnostic tool for the identification of organogallium compounds of this type. Ion abundance data for all compounds are presented and the fragmentation processes believed to give these ions are discussed.
