Trimethylboroxine

Structural formula
General
Surname	Trimethylboroxine
other names	2,4,6-trimethylboroxine
Molecular formula	C 3 H 9 B 3 O 3
Brief description	colorless liquid
External identifiers / databases
CAS number 823-96-1 EC number 617-330-1 ECHA InfoCard 100.112.344 PubChem 574072 Wikidata Q15829729
properties
Molar mass	125.53 g mol −1
Physical state	liquid
density	0.898 g cm −3 (25 ° C)
Melting point	−38 ° C
boiling point	78-80 ° C
Refractive index	1.362 (20 ° C)
safety instructions
GHS labeling of hazardous substances danger H and P phrases H: 225-314 P: 210-280-305 + 351 + 338-310
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . Refractive index: Na-D line , 20 ° C

Trimethylboroxine is a chemical compound from the group of boroxines .

Extraction and presentation

Trimethylboroxine can be obtained by reacting trimethylborane with boron (III) oxide at 300 ° C.

${\displaystyle \mathrm {B(CH_{3})_{3}+B_{2}O_{3}\longrightarrow (CH_{3}BO)_{3}} }$

Other ways of representation are also known.

properties

Trimethylboroxine is a colorless clear liquid.

use

Trimethylboroxine is used as a derivatizing agent for GLC analysis , as a polymerization additive and for the production of CBS catalysts for asymmetric reductions.

Individual evidence

1. ↑ ^{a b c d e f g h i j} data sheet trimethylboroxine, 99% from Sigma-Aldrich , accessed on May 14, 2017 ( PDF ).
2. ↑ Georg Brauer (Ed.), With the collaboration of Marianne Baudler a . a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 816.
3. ^ Herbert C. Brown, Thomas E. Cole: Organoboranes. 39. Convenient procedures for the preparation of methylboronic acid and trimethylboroxine. In: Organometallics. 4, 1985, pp. 816-821, doi : 10.1021 / om00124a002 .