Bromobenzaldehydes
| Bromobenzaldehydes | |||||||
| Surname | 2-bromobenzaldehyde | 3-bromobenzaldehyde | 4-bromobenzaldehyde | ||||
| other names | o -Bromobenzaldehyde | m -bromobenzaldehyde | p -bromobenzaldehyde | ||||
| Structural formula |
|
|
|
||||
| CAS number | 6630-33-7 | 3132-99-8 | 1122-91-4 | ||||
| PubChem | 81129 | 76583 | 70741 | ||||
| Molecular formula | C 7 H 5 BrO | ||||||
| Molar mass | 185.03 g mol −1 | ||||||
| Physical state | liquid | firmly | |||||
| Melting point | 16-19 ° C | 18-21 ° C | 55-58 ° C | ||||
| boiling point | 230 ° C | 233-236 ° C | 66-68 ° C (2 mmHg) | ||||
|
GHS labeling |
|
|
|
||||
| H and P phrases | 315-319-335 | 302-315-319-335 | 302-315-319-334-335 | ||||
| no EUH phrases | no EUH phrases | no EUH phrases | |||||
| 261-305 + 351 + 338 | 261-305 + 351 + 338 | 261-305 + 351 + 338-342 + 311 | |||||
The bromobenzaldehydes form a group of substances in chemistry that is derived from both benzaldehyde and bromobenzene . The structure consists of a benzene ring with attached aldehyde group (-CHO) and bromine (-Br) as substituents . Their different arrangements ( ortho , meta or para ) result in three constitutional isomers with the empirical formula C 7 H 5 BrO.
properties
The 4-bromobenzaldehyde, which has the highest symmetry, has the highest melting point.
use
4-bromobenzaldehyde is used to make 4-formylphenylboronic acid .
Individual evidence
- ↑ a b c data sheet 2-bromobenzaldehyde from Sigma-Aldrich , accessed on April 26, 2011 ( PDF ).
- ↑ a b c data sheet 3-bromobenzaldehyde from Sigma-Aldrich , accessed on April 26, 2011 ( PDF ).
- ↑ a b data sheet 4-bromobenzaldehyde from Sigma-Aldrich , accessed on April 26, 2011 ( PDF ).
- ↑ Alfa Aesar Catalog 2008/09, p. 285.
- ↑ H. Feulner, G. Linti, H. Nöth: contributions to the chemistry of boron, 206. representation and structural characterization of p-formylbenzeneboronic acid . In: Chem. Ber. tape 123 , no. 9 , 1990, pp. 1841–1843 , doi : 10.1002 / cber.19901230915 .