DEPT NMR: Signals and Problem Solving - Chemistry Steps
WEBDEPT NMR. What is it? What are the signal types, which signals are pointing down in DEPT and how to use it for solving NMR problems?
DEPT: A tool for 13C peak assignments - Nanalysis
WEBNov 19, 2015 · Distortionless Enhancement by Polarization Transfer (DEPT) is a double resonance pulse program that transfers polarization from an excited nucleus to another – most commonly 1H → 13C.
13.11: DEPT ¹³C NMR Spectroscopy - Chemistry LibreTexts
WEBUnderstand why the peaks do not have splitting like in 1 H NMR. Using DEPT, distinguish whether a methyl (CH 3), methylene (CH 2), methine (CH) or quarternary C is present in the molecule and how many. Propose a structure based on 13 C spectral data.
DEPT - NMR Wiki
WEBApr 12, 2009 · DEPT is an acronym for Distortionless Enhancement by Polarization Transfer. This experiment allows to determine multiplicity of carbon atom substitution with hydrogens. For this purpose, three experiments need to be recorded, where pulse with φ 3 has flip angle of 45 o (a), 90 o (b), and 135 o (c).
13.13: DEPT ¹³C NMR Spectroscopy - Chemistry LibreTexts
WEBAssigning a Chemical Structure from a 13 C NMR Spectrum. Propose a structure for an alcohol, C 4 H 10 O, that has the following 13 C NMR spectral data: Broadband decoupled 13 C NMR: 19.0, 31.7, 69.5 δ; DEPT-90: 31.7 δ; DEPT-135: positive peak at 19.0 δ, negative peak at 69.5 δ.
12.12: ¹³C NMR Spectroscopy and DEPT - Chemistry LibreTexts
WEBDEPT is used for distinguishing between a CH 3 group, a CH 2 group, and a CH group. The proton pulse is set at 45°, 90°, or 135° in the three separate experiments. The different pulses depend on the number of protons attached to a carbon atom. Fig 11. is an example about DEPT spectrum.
13.12 DEPT 13C NMR Spectroscopy – Organic Chemistry: A Tenth …
WEBAmong these techniques is one called DEPT–NMR, for distortionless enhancement by polarization transfer, which makes it possible to distinguish between signals due to CH3, CH2, CH, and quaternary carbons.
13Carbon NMR - chem.ch.huji.ac.il
WEB13 C is a low sensitivity nucleus that yields sharp signals and has a wide chemical shift range. A typical analysis of a 13 C NMR spectrum consists of matching expected chemical shifts to the expected moieties.
Distortionless enhancement by polarization transfer (DEPT)
WEBDEPT 45 yields CH, CH 2 and CH 3 signals positive, DEPT 90 yields only CH signals and DEPT 135 yields CH and CH 3 positive while CH 2 is negative. The use of DEPT in 13 C assignment is described in connection with 13 C NMR .
Ch 13 - DEPT - Faculty of Science
WEBOne of these techniques is known as DEPT (distortionless enhancement of polarisation transfer) which can be used to give similar information to an off-resonance decoupled spectra i.e. the number of attached H.