- METHOD FOR STORING AND/OR TRANSPORTING GALLIUM CHLORIDE
-
Method for storing and/or transporting GaCl3 involving the step of adding an aluminium compounds of the formula R3-xAlClx, wherein R is a linear or branched alkyl group with 1-8 carbon atoms and x is 0 or 1, to said GaCl3 in an Al/Ga molar ratio of at least 0.2, thereby forming a liquid formulation, followed by introducing said liquid formulation in a container.
- -
-
Page/Page column 7
(2019/05/22)
-
- Intramolecularly nitrogen-stabilized organoaluminum compounds containing naphthyl, benzyl, and phenyl ligands
-
N,N-Dimethylnaphthylamin (1) reacts with Butyllithium to give Li(Et 2O)C10H6NMe2-8 (2). The reaction of 2 with Et2AlCl and EtAlCl2 yields Et2AlC 10H6NMesub
- Schumann, Herbert,Dechert, Sebastian,Hummert, Markus,Lange, Katharina C. H.,Schutte, Stefan,Wassermann, Birgit C.,Koehler, Katrin,Eichhorn, Jens
-
p. 1196 - 1204
(2008/10/09)
-
- Dehydration of LnCl3·6H2O (Ln=Tb, Nd, Dy) in the reaction with i-Bu3Al, Et3Al, Et2AlCl, EtAlCl2 and formation of the complexes LnCl3·3(BuO)3PO
-
The dehydration of toluene insoluble salts TbCl3·6H2O (1), DyCl3·6H2O (2) and NdCl3·6H2O (3) in their reaction with organoaluminum compounds (RnAlX3-n): i-Bu3Al, Et3Al, Et2AlCl, EtAlCl2 and the influence of (BuO)3PO (TBP) on the process were studied. In the reaction of RnAlX3-n with the water of crystallization of salts 1-3, aluminoxanes and the following gases are formed: i-BuH for i-Bu3Al, EtH for Et3Al, EtH and HCl for Et2AlCl and EtAlCl2 as a result of the attack on the Al-C or Al-Cl bond independent of the presence of TBP. In the absence of TBP the salts 1-3 are dehydrated by RnAlX3-n to give insoluble products LnCl3·0.5H2O·0.5(R2Al) 2O, where R is alkyl for i-Bu3Al and Et3Al, or R is alkyl and Cl for Et2AlCl. The reaction of RnAlX3-n with 1-3 in the mixture of toluene-TBP at the ratio TBP/Ln≥12:1 results in the complete removal of water from LnCl3·6H2O and leads to the formation of homogeneous solutions, containing aluminoxanes and LnCl3·3TBP complexes. Homogeneous solutions, obtained after interaction in the system NdCl3·6H2O+TBP+PhMe+R3Al were then activated with either i-Bu3Al or (i-Bu2Al)2O and used as catalysts for polymerization of butadiene. All the catalysts were highly active for polymerization of butadiene, and produced a low-molecular polybutadiene.
- Bulgakov, Ramil G.,Kuleshov, Sergei P.,Zuzlov, Aleksei N.,Mullagaleev, Ildar R.,Khalilov, Leonard M.,Dzhemilev, Usein M.
-
-
- Titanium-catalyzed cyclotrimerization of butadiene. Part II. The (C6H6)TiII(AlCl4)2-EtxAlCl3-x (x=1-3) systems
-
This paper describes the kinetics of butadiene cyclotrimerization catalyzed by the Ia-EtAlCl2, Et2AlCl or Et3Al systems and the results of investigations of these systems by electronic absorption spectroscopy. The study was carried out to improve understanding of the effects of organo-aluminum compounds on the catalytic properties of Ia and to find the optimum conditions for (Z,E,E)-CDT production. In view of our long-term efforts to identify the catalytic species in the butadiene cyclotrimerization in systems based on different titanium precursors, this is the initial step in a comparative study of the (arene)titanium (II) systems and the Ti(IV)-based systems.
- Polacek, J.,Antropiusova, H.,Petrusova, L.,Mach, K.
-
-
- Aluminum Dichloride and Dibromide. Preparation, Spectroscopic (Including Matrix Isolation) Study, Reactions, and Role (Together with Alkyl(aryl)aluminum Monohalides) in the Preparation of Organoaluminum Compounds
-
Anhydrous aluminum trichloride or bromide when heated in a 2:1 molar ratio with aluminum powder as a suspension in dry n-heptane or methylcyclohexane was found to be partially reduced to aluminum dichloride or dibromide.Ultrasound treatment (sonication) significantly promotes the reaction.Aluminum dichloride in higher purity was obtained by the reaction of the gaseous aluminum trichloride with aluminum metal in a high-vacuum reactor, allowing subsequent investigation by IR spectroscopy.An aluminum sub-halide of the form Al2(i-Bu)4-xClx was also prepared through the reaction of the tetraisobutyldialane and HCl at room temperature.Both materials were investigated by IR spectroscopy and compared to AlCl2 prepared and isolated through the codeposition of aluminum atom and molecular chlorine in a solid argon matrix.The matrix study characterized AlCl2 together with AlCl and AlCl3, which were also formed in the system.The paramagnetic aluminum dihalides, i.e.AlCl2 and AlBr2, are associated in the condensed state (except under matrix isolation conditions where they are monomeric).An ESR study of the pyridinium complex of AlCl2 was carried out and showed its paramagnetic nature.In the present study, for simplicity, the reactions of the aluminum dihalide are considered as those of the dimers but could involve higher associated oligomers.MNDO calculation on the heats of formation of several possible isomeric structures of Al2Cl4 indicate the preference for both halogen bridging and significant Al-Al bonding in the dimer.Reaction of AlCl3 + Al with ethylene, the Hall and Nash reaction, was reinvestigated by 13C and 27Al NMR spectroscopy.The reaction was found to give, besides ethylaluminum sesquichloride, 1,2- and 1,1-bis(dichloroaluminio)ethanes.Cyclohexene in a similar reaction gives although less readily, 1,2-bis(dichloroaluminio)cyclohexane.The reaction are indicative of addition of (AlCl2)2 to the olefins.Aklyl- and arylaluminum monohalides are intermediately formed in the reaction of alkyl halides or halobenzenes with active aluminum powder.These divalent aluminum halides are also considered to be dimeric in nature and immediately react with excess of the alkyl (aryl) halides to form the corresponding sesquihalides.In contrast, aluminum dihalides formed in the aluminum trihalide-aluminum metal systems react with alkyl or aryl halides to give alkyl(aryl)aluminum dihalides.Sonication was found to significantly promote these reactions.
- Olah, George A.,Farooq, Omar,Farnia, S. Morteza F.,Bruce, Mark R.,Clouet, Francoise L.,et. al.
-
p. 3231 - 3238
(2007/10/02)
-
- Bis- and Tris-aluminum-alkane Compounds as Intermediates During the Dissolution of Aluminum Metal with Olefins in the Presence of Aluminum Trichloride or Alkyl Aluminum Dichloride
-
Aluminum can be dissolved by ethylene in the presence of aluminum trichloride to form primarily bis-(dichloro-aluminum)-ethanes (1) and (2) or in the presence of ethyl aluminum dichloride to form chloro-aluminum-ethyl-(dichloroaluminum)-ethane (3) and/or a tris-aluminum compound Cl2Al-C2H4-Al(Cl)-C2H4-Al(Cl)Et (4). 1-4 reacts further with olefins, with elimination of alkyl aluminum dichloride and/or dialkyl aluminum chloride, which are practically inert towards olefins.The C2H4-bridge is available to the growth and displacement reaction with olefins. - Keywords: Bis- and Tris-aluminum-alkane Compounds, Aluminum
- Martin, Heinz,Bretinger, Helmut
-
p. 182 - 186
(2007/10/02)
-