Carbonyl bromide

Structural formula
General
Surname	Carbonyl bromide
other names	Bromphosgene Carbonyl dibromide
Molecular formula	CBr 2 O
Brief description	colorless liquid with a strong odor
External identifiers / databases
CAS number 593-95-3 PubChem 79057 Wikidata Q4115352
properties
Molar mass	187.81 g mol −1
Physical state	liquid
density	2.5 g cm −3
boiling point	65 ° C
safety instructions
GHS hazard labeling no classification available
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Carbonyl bromide ( bromophosgene ) is a chemical compound from the group of carbonyl compounds .

Extraction and presentation

Carbonyl bromide was first synthesized in 1863 by J. Schiel by reacting carbon monoxide with bromine vapor in sunlight.

Today it is obtained by reacting carbon tetrabromide with sulfuric acid at 150–170 ° C with a yield of about 50%.

${\displaystyle \mathrm {CBr_{4}\ +\ H_{2}SO_{4}\ {\xrightarrow[{}]{}}} }$ ${\displaystyle \mathrm {\ COBr_{2}+\ 2HBr+\ SO_{3}\ {\xrightarrow[{}]{}}} }$ ${\displaystyle \mathrm {\ COBr_{2}+\ SO_{2}+\ H_{2}O+\ Br_{2}} }$

properties

Carbonyl bromide is a colorless liquid with a strong odor that smokes in air and decomposes in light and when heated. It hydrolyzes in water to form hydrogen bromide and carbon dioxide .

use

Carbonyl bromide is used to make dyes.

Individual evidence

1. ↑ ^{a b c d e f} Dale L. Perry: Handbook of Inorganic Compounds . CRC Press, 1995, ISBN 978-0-8493-8671-8 , pp. 101 ( limited preview in Google Book search).
2. ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
3. ↑ ^{a b} T.A. Ryan, EA Seddon, KR Seddon, C. Ryan: Phosgene And Related Carbonyl Halides . Elsevier, 1996, ISBN 978-0-08-053880-8 , pp. 666–667 ( limited preview in Google Book Search).