3-methyl-2-pentanone

Structural formula
Structural formula without stereochemistry
General
Surname	3-methyl-2-pentanone
other names	Methyl sec- butyl ketone
Molecular formula	C 6 H 12 O
External identifiers / databases
CAS number 565-61-7 EC number 209-282-1 ECHA InfoCard 100.008.439 PubChem 11262 Wikidata Q15720827
properties
Molar mass	100.16 g mol −1
Physical state	liquid
density	0.815 g cm −3 (25 ° C)
boiling point	118 ° C (758  mmHg )
Refractive index	1.4 (20 ° C)
safety instructions
GHS labeling of hazardous substances danger H and P phrases H: 225 P: 210
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . Refractive index: Na-D line , 20 ° C

3-methyl-2-pentanone (also called methyl sec-butyl ketone ) is an organic chemical compound from the group of ketones . It is an isomer to 2-hexanone and 3-hexanone .

Extraction and presentation

It can be produced by oxidation of 3-methyl-2-pentanol .

Also possible is the representation by hydrogenation of 3-methyl-3-penten-2-one .

Stereochemistry

3-Methyl-2-pentanone is chiral and contains a stereocenter, so there are two stereoisomers , the ( R ) -3-methyl-2-pentanone and the ( S ) -3-methyl-2-pentanone. If 3-methyl-2-pentanone is mentioned without a prefix in this article or in the scientific literature, the racemate is always ( RS ) -3-methyl-2-pentanone, i.e. a 1: 1 mixture of ( R ) -3 -Methyl-2-pentanone and ( S ) -3-methyl-2-pentanone are meant.

use

3-methyl-2-pentanone can be used as an intermediate in the production of other chemical compounds (such as filberton ).

Individual evidence

1. ↑ ^{a b c d e} data sheet 3-Methyl-2-pentanone, 99% from Sigma-Aldrich , accessed on November 6, 2014 ( PDF ).
2. ↑ ^{a b} Google Patents: CN101597223B - Method for synthesizing filbertone - Google Patents , accessed January 12, 2019