Manganese (II) bromide

Crystal structure
__ Mn 2+      __ Br -
General
Surname	Manganese (II) bromide
other names	Manganese dibromide
Ratio formula	MnBr 2
Brief description	purple powder
External identifiers / databases
CAS number 13446-03-2 10031-20-6 (tetrahydrate) PubChem 83471 Wikidata Q416246
properties
Molar mass	214.75 g mol −1
Physical state	firmly
density	4.385 g cm −3 (25 ° C)
Melting point	698 ° C
boiling point	1027 ° C
solubility	soluble in water
safety instructions
GHS labeling of hazardous substances Caution H and P phrases H: 302-312-332 P: 280
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Manganese (II) bromide is a chemical compound of the manganese from the group consisting of bromides .

Extraction and presentation

Manganese (II) bromide can be obtained by reacting manganese with bromine .

${\displaystyle \mathrm {Mn+Br_{2}\longrightarrow MnBr_{2}} }$

It is also possible to obtain manganese (II) carbonate by reacting with hydrogen bromide or by dehydrating the tetrahydrate at temperatures above 190.degree.

It is also formed during the production of bromine through the reaction of manganese (IV) oxide with hydrobromic acid .

${\displaystyle \mathrm {4\ HBr+MnO_{2}\longrightarrow MnBr_{2}+Br_{2}+2\ H_{2}O} }$

properties

Manganese (II) bromide

Manganese (II) bromide is a purple powder. It has a trigonal crystal structure with the space group P 3 m 1 (space group no.164) .

use

Manganese (II) bromide can be used instead of palladium in the Stille coupling .

Individual evidence

1. ↑ ^{a b c d e f g} Data sheet Manganese (II) bromide, 98% from Sigma-Aldrich , accessed on July 8, 2012 ( PDF ).
2. ↑ ^{a b} web elements: WebElements Periodic Table of the Elements | Manganese | manganese dibromide
3. ↑ webelements: WebElements Periodic Table of the Elements | Manganese | chemical reaction data
4. ^ RMA Lieth: Preparation and Crystal Growth of Materials with Layered Structures . Springer, 1977, ISBN 90-277-0638-7 , pp. 59 ( limited preview in Google Book search).
5. ^ Karl-Heinz Lautenschläger, Werner Schröter, Andrea Wanninger: Taschenbuch der Chemie . Harri Deutsch Verlag, 2005, ISBN 978-3-8171-1760-4 , pp. 221 ( limited preview in Google Book search).
6. ^ Jean D'Ans, Ellen Lax: Paperback for Chemists and Physicists, Volume 3 . Springer, 1997, ISBN 3-540-60035-3 , pp. 562 ( limited preview in Google Book search).
7. ↑ Ivica Cepanec: Synthesis Of Biaryls . Elsevier, 2004, ISBN 0-08-044412-1 , pp. 104 ( limited preview in Google Book search).