Indium trimethyl

Structural formula
General
Surname	Indium trimethyl
other names	Trimethylindium
Molecular formula	C 3 H 9 in
Brief description	white solid
External identifiers / databases
CAS number 3385-78-2 EC number 222-200-9 ECHA InfoCard 100.020.183 PubChem 76919 Wikidata Q4463086
properties
Molar mass	159.92 g mol −1
Physical state	firmly
density	1.568 g cm −3
Melting point	88 ° C
boiling point	136 ° C
solubility	reacts with water
safety instructions
GHS labeling of hazardous substances danger H and P phrases H: 250-260-314 EUH: 014 P: ?
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Indium trimethyl is a chemical compound from the group of organometallic compounds .

Extraction and presentation

Indium trimethyl can be produced by the Grignard reaction of indium and magnesium with bromomethane

${\displaystyle \mathrm {2\ In+3\ Mg+6\ CH_{3}Br\longrightarrow 2\ In(CH_{3})_{3}+3\ MgBr_{2}} }$

or by the metathesis reaction of indium (III) chloride or indium (III) bromide with methyllithium .

${\displaystyle \mathrm {InCl_{3}+3\ LiCH_{3}\longrightarrow 3\ LiCl+In(CH_{3})_{3}} }$

It can also be produced by a transmetallation reaction of metallic indium and mercury dimethyl at 135 ° C.

${\displaystyle \mathrm {2\ In+3\ Hg(CH_{3})_{2}\longrightarrow 3\ Hg+2\ In(CH_{3})_{3}} }$

properties

Indium trimethyl is a white pyrophoric solid. It consists of monomeric molecules in the gas state and in solution ( benzene , cyclopentane ), but is tetrameric in the solid state. The molecule has a trigonal-planar structure. The compound is relatively inert. A violent reaction occurs with air and cold water. With acids , rapid hydrolysis takes place with evolution of methane . It is soluble in ether, petroleum ether, cyclohexane , benzene and methylene chloride ; it reacts with alcohols . Adducts are formed with electron donors such as trialkylamines.

use

Indium trimethyl is used to make indium phosphide . In semiconductor production it is used as a doping reagent or to produce III / V semiconductor layers.

See also

• Indium triethyl
• Trimethylgallium

Individual evidence

1. ↑ ^{a b c d} EPICHEM: Trimethylindium, March 13, 2000, accessed December 27, 2019.
2. ↑ ^{a b} AMERICAN ELEMENTS: Trimethylindium C3H9In , accessed on September 22, 2018.
3. ↑ ^{a b c d e} Georg Brauer (Ed.), With the collaboration of Marianne Baudler u. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 864.
4. ↑ ^{a b c d e} Wiberg, E .; Wiberg, N .; Holleman, AF : Inorganic Chemistry , 103rd Edition, 2017 Walter de Gruyter GmbH & Co. KG, Berlin / Boston, ISBN 978-3-11-026932-1 , pp. 1405-1407, (accessed via De Gruyter Online).
5. ^ Anthony C. Jones, Paul O'Brien: CVD of Compound Semiconductors: Precursor Synthesis, Developmeny and ... John Wiley & Sons, 2008, ISBN 3-527-61462-1 , pp. 55 ( limited preview in Google Book search).