Trimethyl borate
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| Names | |||
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| Other names
trimethoxyborane, boron trimethoxide
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| Identifiers | |||
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3D model (JSmol)
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| ChEBI | |||
| ChemSpider | |||
| ECHA InfoCard | 100.004.063 | ||
| EC Number | 204-468-9 | ||
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PubChem CID
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| Properties | |||
| C3H9BO3 | |||
| Molar mass | 103.91 g·mol−1 | ||
| Appearance | colourless liquid | ||
| Density | 0.932 g/ml | ||
| Melting point | −34 °C (−29 °F; 239 K) | ||
| Boiling point | 68 to 69 °C (154 to 156 °F; 341 to 342 K) | ||
| decomposition | |||
| Hazards | |||
| Main hazards | flammable | ||
| Related compounds | |||
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Other cations
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Trimethyl phosphite Tetramethyl orthosilicate |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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 (what is   ?) |
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| Infobox references | |||
Trimethyl borate is the organoboron compound with the formula B(OCH3)3. It is a colourless liquid that burns with a green flame. It is an intermediate in the preparation of sodium borohydride and is a popular reagent in organic chemistry.
Borate esters are prepared by heating boric acid or related boron oxides with alcohols under conditions where water is removed.
Trimethyl borate is the main precursor to sodium borohydride by its reaction with sodium hydride:
It is a gaseous anti-oxidant in brazing and solder flux. Otherwise, trimethyl borate has no announced commercial applications. It has been explored as a fire retardant, as well as being examined as an additive to some polymers. It is a useful reagent in organic synthesis, as a precursor to boronic acids, which are used in Suzuki couplings. These boronic acids are prepared via reaction of the trimethyl borate with Grignard reagents followed by hydrolysis:.
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Wikipedia