Trimethylaluminium
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Trimethylaluminium is one of the simplest examples of an organoaluminium compound. Despite its name it has the formula Al2(CH3)6 (abbreviated as Al2Me6 or TMA), as it exists as a dimer. This colorless liquid is pyrophoric. It is an industrially important compound, closely related to triethylaluminium.[3][4]
Quick Facts Names, Identifiers ...
Names | |
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IUPAC name
Trimethylalumane | |
Other names
Trimethylaluminum; aluminium trimethyl; aluminum trimethyl | |
Identifiers | |
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3D model (JSmol) |
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ChemSpider |
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ECHA InfoCard | 100.000.776 |
PubChem CID |
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UNII | |
CompTox Dashboard (EPA) |
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Properties | |
C6H18Al2 | |
Molar mass | 144.17 g/mol 72.09 g/mol (C3H9Al) |
Appearance | Colorless liquid |
Density | 0.752 g/cm3 |
Melting point | 15 °C (59 °F; 288 K) |
Boiling point | 125–130 °C (257–266 °F; 398–403 K)[1][2] |
Reacts | |
Vapor pressure |
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Viscosity |
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Thermochemistry | |
Heat capacity (C) |
155.6 J/mol·K[2] |
Std molar entropy (S⦵298) |
209.4 J/mol·K[2] |
Std enthalpy of formation (ΔfH⦵298) |
−136.4 kJ/mol[2] |
Gibbs free energy (ΔfG⦵) |
−9.9 kJ/mol[2] |
Hazards | |
Occupational safety and health (OHS/OSH): | |
Main hazards |
Pyrophoric |
GHS labelling: | |
[1] | |
Danger | |
H250, H260, H314[1] | |
P222, P223, P231+P232, P280, P370+P378, P422[1] | |
NFPA 704 (fire diamond) | |
Flash point | −17.0 °C (1.4 °F; 256.1 K)[1] |
Related compounds | |
Related compounds |
Triethylaluminium |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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