3-methylcyclopent-2-en-1-one Struktur

3-Methylcyclopent-2-enon

Bezeichnung:3-Methylcyclopent-2-enon

Englisch Name:3-methylcyclopent-2-en-1-one

CBNumberCB9246368

SummenformelC6H8O

Molgewicht96.13

Synonyma

3-Methylcyclopent-2-enon

3-Methylcyclopent-2-enon physikalisch-chemischer Eigenschaften

Schmelzpunkt	3-5 °C (lit.)
Siedepunkt	74 °C/15 mmHg (lit.)
Dichte	0.980 g/mL at 20 °C 0.971 g/mL at 25 °C (lit.)
FEMA	3435 \| 1-METHYL-1-CYCLOPENTEN-3-ONE
Brechungsindex	n20/D 1.488(lit.)
Flammpunkt	150 °F
storage temp.	2-8°C
Löslichkeit	Soluble in DMSO
Aggregatzustand	Liquid
Farbe	Clear light yellow to yellow-brown
PH	4.9 (10g/l, H2O, 20℃)
Geruch (Odor)	at 1.00 % in dipropylene glycol. sweet fruity fatty
Geruchsart	fruity
Wasserlöslichkeit	miscible
JECFA Number	1105
BRN	1280476
LogP	0.54
CAS Datenbank	2758-18-1(CAS DataBase Reference)
NIST chemische Informationen	2-Cyclopenten-1-one, 3-methyl-(2758-18-1)
EPA chemische Informationen	3-Methyl-2-cyclopenten-1-one (2758-18-1)

Sicherheit

Gefahreninformationscode (GHS)

R-Sätze Betriebsanweisung:
R36/38:Reizt die Augen und die Haut.
S-Sätze Betriebsanweisung:
S24/25:Berührung mit den Augen und der Haut vermeiden.
Beschreibung
May be prepared by dehydrohalogenation of 2-chloro-l-methylcyclopentan-3-one.
Chemische Eigenschaften
clear light yellow to yellow-brownish liquid
Chemische Eigenschaften
1-Methyl-1-cyclopenten-3-one has a sweet-floral, warm-spicy and diffusive yet quite tenacious odor.
Occurrence
Reported found in roasted onion, cooked pork, black tea, soybean and dried bonito
Verwenden
It is an important raw material and intermediate used in Organic Synthesis, Pharmaceuticals, Agrochemicals.
Verwenden
3-Methyl-2-cyclopentenone was used in the synthesis of 2-hydroxy-3-methyl-2-cyclopentenone.
synthetische
By dehydrohalogenation of 2-chloro-1-methyl-cyclopentan-3-one.
Definition
ChEBI: 3-Methyl-2-cyclopenten-1-one is a cyclic ketone.
Synthesis Reference(s)
Journal of the American Chemical Society, 101, p. 494, 1979 DOI: 10.1021/ja00496a044
The Journal of Organic Chemistry, 55, p. 371, 1990
Allgemeine Beschreibung
3-Methyl-2-cyclopenten-1-one is a component of smoke flavoring.