PHENYLSELENYL BROMIDE Property

Melting point:

58-62 °C (lit.)

Boiling point:

107-108 °C/15 mmHg (lit.)

Flash point:

107-108°C/15mm

storage temp. 

2-8°C

solubility 

Soluble in toluene, very faint turbidity.

form 

solid

color 

Orange to Brown to Dark purple

Odor

unpleasant smell.

Sensitive 

Moisture Sensitive

BRN 

2039772

Exposure limits

ACGIH: TWA 0.2 mg/m3
NIOSH: IDLH 1 mg/m3; TWA 0.2 mg/m3

InChIKey

LCEFEIBEOBPPSJ-UHFFFAOYSA-N

CAS DataBase Reference

34837-55-3(CAS DataBase Reference)

Safety

Hazard Codes 

T,N

Risk Statements 

23/25-33-50/53

Safety Statements 

20/21-28-45-60-61

RIDADR 

UN 2928 6.1/PG 2

WGK Germany 

3

F 

10-21

HazardClass 

6.1

PackingGroup 

II

HS Code 

29319090

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H290May be corrosive to metals

H373May cause damage to organs through prolonged or repeated exposure

H410Very toxic to aquatic life with long lasting effects

Precautionary statements

P234Keep only in original container.

P260Do not breathe dust/fume/gas/mist/vapours/spray.

P273Avoid release to the environment.

P301+P310IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.

P314Get medical advice/attention if you feel unwell.

PHENYLSELENYL BROMIDE Chemical Properties,Usage,Production

Chemical Properties

dark brownish to black crystals

Uses

Employed in the synthesis of enones by selenenylation of α-cyano ketones with lithium naphthalenide. Phenylselenyl bromide was used in the preparation of exo-2-methyl-7-phenylselenyl-octahydro-8-oxa-2,7b-diaza-dicyclopenta[a,e]pentalene-1,3-dione and endo-2-methyl-7-phenylselanyl-octahydro-8-oxa-2,7b-diaza-dicyclopenta[a,e]pentalene-1,3-dione.

Synthesis

Phenylselenyl Bromide can be quantitatively prepared in situ by treatment of Diphenyl Diselenide with an equimolar amount of Bromine.

Purification Methods

Distil it in a vacuum, recrystallise it from pet ether, CHCl3 (EtOH free), or Et2O (cooling mixture) to give dark red or orange crystals. These sublime at 25o/0.001mm [Behaghel et al. Chem Ber 65 815 1932, Pitteloud & Petrzilka Helv Chim Acta 62 1319 1979]. [Beilstein 6 III 1111.] HIGHLY TOXIC.