Where does DMSO-D6 show up on NMR?

Pure deuterated DMSO shows no peaks in 1H NMR spectroscopy and as a result is commonly used as an NMR solvent. However commercially available samples are not 100% pure and a residual DMSO-d5 1H NMR signal is observed at 2.50ppm (quintet, JHD=1.9Hz). The 13C chemical shift of DMSO-d6 is 39.52ppm (septet).

Why DMSO shows septet in NMR?

Deuterated dimethysulfoxide (DMSO-d6) is usually sold at least 99% deuterium (D) rich. That’s why DMSO-d6 gives a septet centered at 39.52 ppm. The signals actually belong to the residual hidrogenated DMSO (1% or less; 2.50 ppm) and the amount of water (ca. 3.6 ppm) that dissolves in DMSO.

Why is DMSO used in NMR?

As dmso is highly miscible with water, during handling DMSO-d6 absorbs moisture and the peak at 3.33 is due to the moisture present. If the DMSO-d6 is being used for long time, usually the water peak comes bigger than the residual solvent peak in NMR.

Why does DMSO give Quintet?

In DMSO-d5, the hydrogen atom is adjacent to two deuterium atoms (NMR active nucleus with I=1). Hence, the multiplicity of its signal in an NMR spectrum is, 2(1)(2)+1=5. Fleury, the two deuterium atoms adjacent to the proton splits the signal into quintet according to 2nI+1 formula (I = 1 for deuterium).

Does DMSO show up in IR?

The experimental IR and NIR spectra of pure water and DMSO are displayed in Figure 1a. Its IR spectrum is dominated by broad bands, where the most prominent features are the OH bending mode peaking at 1636 cm–1 and the broad OH stretching band ranging from 2800 to 3700 cm–1.

How is DMSO-d 6 used in NMR spectroscopy?

Use in NMR spectroscopy. Pure deuterated DMSO shows no peaks in 1 H NMR spectroscopy and as a result is commonly used as an NMR solvent. However commercially available samples are not 100% pure and a residual DMSO-d 5 1 H NMR signal is observed at 2.50ppm (quintet, J HD =1.9Hz). The 13 C chemical shift of DMSO-d 6 is 39.52ppm (septet).

What is the 13 C chemical shift of DMSO-d 6?

The 13 C chemical shift of DMSO-d 6 is 39.52ppm (septet). ^ Fruhstorfer, Wolfgang; Hampel, Bruno, (E. Merck A.-G.); 1964; “Hexadeuterodimethyl sulfoxide.”; DE 1171422 (B)

Which is an isotopologue of dimethyl sulfoxide d6?

Deuterated DMSO, also known as dimethyl sulfoxide-d6, is an isotopologueof dimethyl sulfoxide(DMSO, (CH3)2S=O)) with chemical formula ((CD3)2S=O) in which the hydrogenatoms (“H”) are replaced with their isotopedeuterium(“D”). Deuterated DMSO is a common solventused in NMR spectroscopy. Production[edit]

Which is the correct formula for deuterated DMSO?

Infobox references. Deuterated DMSO, also known as dimethyl sulfoxide-d6, is an isotopologue of dimethyl sulfoxide (DMSO, (CH3)2S=O)) with chemical formula ((CD3)2S=O) in which the hydrogen atoms (“H”) are replaced with their isotope deuterium (“D”). Deuterated DMSO is a common solvent used in NMR spectroscopy.