4-Bromstyrol

Bezeichnung:4-Bromstyrol

CAS-Nr2039-82-9

Englisch Name:4-Bromostyrene

CBNumberCB5664757

SummenformelC8H7Br

Molgewicht183.05

MOL-Datei2039-82-9.mol

Synonyma

4-Bromstyrol

4-Bromstyrol physikalisch-chemischer Eigenschaften

Schmelzpunkt	4.5 °C
Siedepunkt	89 °C16 mm Hg(lit.)
Dichte	1.40 g/mL at 20 °C
Brechungsindex	n20/D 1.594(lit.)
Flammpunkt	168 °F
storage temp.	-20°C
Löslichkeit	Miscible with ethanol, ether and benzene.
Aggregatzustand	Liquid
Farbe	light greenish-yellow
BRN	1634204
InChIKey	WGGLDBIZIQMEGH-UHFFFAOYSA-N
CAS Datenbank	2039-82-9(CAS DataBase Reference)
NIST chemische Informationen	4-BrC6H4CH=CH2(2039-82-9)

Sicherheit

Kennzeichnung gefährlicher	Xi
R-Sätze:	36/38-36/37/38
S-Sätze:	26-36-37/39
WGK Germany	3
F	8
Hazard Note	Irritant/Keep Cold
HS Code	29036990

Gefahreninformationscode (GHS)

4-Bromostyrene Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R36/38:Reizt die Augen und die Haut.
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
S-Sätze Betriebsanweisung:
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.
S37/39:Bei der Arbeit geeignete Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
Chemische Eigenschaften
clear slightly yellow to yellow liquid
Verwenden
4-Bromostyrene is widely utilized in the synthesis of nitroolefins by alkene cross-metathesis. It plays an important role in the Heck reaction to the synthesis of poly(1,4-phenylenevinylene). It is employed in the structure activity relationships (SAR) study of the chemical and biochemical properties of the vinyl group of styrene. It is also used to investigate the photochemical growth of Br-terminated self-assembled monolayers. It is also involved in the synthesis of silsesquioxanes.
Allgemeine Beschreibung
4-Bromostyrene is a para-halogenated styrene derivative. The proton spectra of 4-bromostyrene exhibits dipolar couplings consistent with planar ground state structures, only if the torsional motion of lowest frequency occurs at about 80cm^-1. It undergoes Heck reaction with 2-bromo-6-methoxynaphthalene in the presence of sodium acetate and Hermann′s catalyst in N,N-dimethylacetamide to afford diarylethene.
läuterung methode
It polymerises above 75o in the presence of benzoyl peroxide. To purify, if it has not gone to a solid resin, dissolve it in Et2O, dry (MgSO4) and add ca 0.1g of 4-tertbutylcatechol (polymerisation inhibitor) per 100g of bromostyrene. Filter, evaporate this under reduced pressure (use as high a vacuum as possible) and distil the residue. Store it in dark bottles in the presence of the inhibitor (at above concentration). [Overberger & Saunders Org Synth Coll Vol III 204 1955, Beilstein 5 IV 1349.]

4-Bromostyrene Upstream-Materialien And Downstream Produkte

4-Bromstyrol Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

2039-82-9, 4-Bromostyrene Verwandte Suche:

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