Synthesis and purification of trimethylgallium for MOCVD: molecular structure of (KF)4·4(Me3Ga)

Kazimierz Starowieyski , Andrzej Chwojnowski , Krzysztof Jankowski , Janusz Lewiński , Janusz Zachara

Abstract

Trimethylgallium was obtained from a 3:1 molar mixture of Me2AlCl (1) and GaCl3 (2) only in the presence of NaCl. The mechanism of the reaction was traced. It is postulated that the gallium–aluminium dimers ClnMe2−nAlCl2 GaClmMe2−m (m and n = 0, 1 or 2), formed in consecutive alkylation steps, do not participate in further alkyl–chlorine exchange. NaCl splits the dimers that form the precipitate of Na[MeAlCl3] (3), thus liberating MenGaCl3−n which, on further alkylation by Me2AlCl, finally yields Me3Ga. For an MOCVD application, it is purified through a complex with KF, which under vacuum decomposes at 180–300 °C, to yield a product contaminated by less than 1 ppm of the total impurities. The X-ray study of the complex reveals a tetrameric, highly symmetrical heterocubane of formula (KF)4·4(Me3Ga). Copyright © 2000 John Wiley \& Sons, Ltd.
Author Kazimierz Starowieyski (FC / LTP)
Kazimierz Starowieyski,,
- Laboratory Of Technological Processes
, Andrzej Chwojnowski
Andrzej Chwojnowski,,
-
, Krzysztof Jankowski (FC / CAC)
Krzysztof Jankowski,,
- Chair Of Analytical Chemistry
, Janusz Lewiński (FC / DCOC)
Janusz Lewiński,,
- Department Of Catalysis And Organometallic Chemistry
, Janusz Zachara (FC / CICSST)
Janusz Zachara,,
- Chair Of Inorganic Chemistry And Solid State Technology
Journal seriesApplied Organometallic Chemistry, ISSN 0268-2605, [1099-0739]
Issue year2000
Vol14
No10
Pages616–622
Keywords in Englishalkylation, methylaluminium compounds, methylgallium compounds, MOCVD, X-ray structure
ASJC Classification1604 Inorganic Chemistry; 1600 General Chemistry
DOIDOI:10.1002/1099-0739(200010)14:10<616::AID-AOC47>3.0.CO;2-T
URL http://onlinelibrary.wiley.com/doi/10.1002/1099-0739(200010)14:10<616::AID-AOC47>3.0.CO;2-T/abstract
Languageen angielski
File
Applied Organometallic Chemistry2000.pdf 78.82 KB
Score (nominal)30
Score sourcejournalList
Publication indicators WoS Citations = 10; GS Citations = 12.0; Scopus SNIP (Source Normalised Impact per Paper): 2000 = 0.937; WoS Impact Factor: 2006 = 1.233 (2) - 2007=1.238 (5)
Citation count*12 (2015-04-26)
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