(2H)Chlorform Chemische Eigenschaften,Einsatz,Produktion Methoden
R-Sätze Betriebsanweisung:
R22:Gesundheitsschädlich beim Verschlucken.
R38:Reizt die Haut.
R40:Verdacht auf krebserzeugende Wirkung.
R48/20/22:Gesundheitsschädlich: Gefahr ernster Gesundheitsschäden bei längerer Exposition durch Einatmen und durch Verschlucken.
S-Sätze Betriebsanweisung:
S36/37:Bei der Arbeit geeignete Schutzhandschuhe und Schutzkleidung tragen.
Beschreibung
Deuterated chloroform (CDCl3), also known as chloroform-d, is an excellent everyday solvent choice for scientists who demand exceptional results. Commonly used as a solvent in proton NMR (1H NMR) spectroscopy, chloroform-d can dissolve a vast array of compounds with ease due to its weak polarity. It is often used in combination with methanol-d as a cosolvent. Plus, its low boiling point makes it relatively easy to recover a sample post-NMR analysis or during organic syntheses.
Chemische Eigenschaften
colourless liquid
Verwenden
Chloroform-d is widely used in the organic solvent for the NMR analysis.
Definition
ChEBI: Deuterated chloroform is a deuterated compound that is an isotopologue of chloroform in which the hydrogen atom is replaced with deuterium. Commonly used as a solvent in proton NMR spectroscopy. It has a role as a non-polar solvent, a NMR solvent and a NMR chemical shift reference compound. It is a deuterated compound and a member of chloromethanes.
synthetische
On a large-scale, chloroform-d (CDCl3) is synthesized by treatment of a hypochlorite salt with deuterated acetone/ethanol or the reaction between chloral and sodium deuteroxide (NaOD). The NaOD is prepared from the reaction of deuterium oxide (D2O) and sodium metal, which liberate deuterium gas from the reaction mixture; therefore, this reaction has drawbacks, including the danger of explosion of the deuterium gas and high risk for use of metal sodium on larger scales. In order to avoid the above drawbacks, the convenient reaction of sodium peroxide and D2O was used to prepare NaOD.
Allgemeine Beschreibung
Chloroform-d (Deuterochloroform, CDCl
3), deuterated chloroform, is a 100% isotopically enriched NMR (Nuclear Magnetic Resonance) solvent. It is widely employed in high resolution NMR studies due to its high chemical and isotopic purity. Quantitaive infrared spectral investigations of carbon-deuterium stretching bands of chloroform-d in various organic solvents have been reported. Raman difference spectroscopic studies of mixtures of chloroform-d and liquid chloroform have been conducted to evaluate frequency shifts in the in the ν
1 and ν
2 bands of CHCl
3 and CDCl
3.
Einzelnachweise
[1] LIA ZAHARANI Mohd R B J, NADER GHAFFARI KHALIGH* Cost and Energy Saving Process for the Laboratory-Scale Production of Chloroform-d[J]. Organic Process Research & Development, 2022, 26 11: 3126-3129. DOI:
10.1021/acs.oprd.2c00260.
[2] MEI-CHUN WU, HUA YANG* Photoredox-Catalyzed C–H Trideuteromethylation of Quinoxalin-2(1H)-ones with CDCl3 as the “CD3” source[J]. Organic Letters, 2022, 24 35: 6412-6416. DOI:10.1021/acs.orglett.2c02439.
(2H)Chlorform Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
