[PDF] tables ppm rmn protons

Tables de déplacements chimiques et couplages RMN

Eu(dpmh-induced shifts of protons in some common environmentst Shift [p p m /mol ofEu(dpm) 3 per mol of substrate] RCH2COR' RCH2CHO RCH2CHO RCH20CH2R RCH2C02CH3 RCH2C02CH3 RCH2CN t The shifts refer to the protons indicated in italics Table 3 31 Type of coupling PCCH PC = CH POCH 3 1 P—IH coupling constants (Hz)t Phosphine oxides 200-750

Spectroscopy tables - Michigan State University

chemical shift (ppm) 35-80 50_80 165-175 165-175 175-185 190-200 205-220 Type of (CH3)4Si R Microsoft Word - Spectroscopy tables docx Author: Alchemist

California State Polytechnic University, Pomona Dr Laurie S

Protons on Carbon Type of Hδ (ppm)Description ROH ArOH RCOH O RNH 2 RCNHR O ArNH 2 RCH 2F 4 5 α to fluorine (C is attached to F) 0 5- a lcoh 4-7 pheno 10-13 carb acid 0 5- amine 3-5 anile 5-9 amide Protons on Oxygen/Nitrogen* *Protons on N or O typically have wide ranges of expected chemical shifts; the actual δ value depends on the solvent

Chapter 13: Nuclear Magnetic Resonance (NMR) Spectroscopy

protons on adjacent carbons will interact and “split” each others resonances into multiple peaks (multiplets) n + 1 rule: equivalent protons that have n equivalent protons on the adjacent carbon will be “split” into n + 1 peaks CC O OCC H HH H H H H H d= 4 1 2H d= 2 0 3H d= 1 2 3H Resonances always split each other The resonance at d

NMR Spectral Assignment and Structural Calculations

between protons at fixed distance log V log r log V = log K - n· r r n K V where K is a constant and n can vary from 4 to 6 Classes of constraints 1 Backbone 6 V = A/d 2 Sidechain V = B/d4 3 Methyl V = C/d4 The NOESY cross-peak intensities (V) are converted into upper distance limits (r) through the relation:

Representative 13C Chemical Shifts

Type of carbon Chemical Shift ( ) ppm 1 alkyl, RCH 3 0-40 2 10alkyl, RCH 2 R -50 3 alkyl, RCHR 2 15-50 4° alkyl, R 4 C 15-50 R 3 CBr, R 3 CCl, R 3 C-N-R 2 10-65 R 3

Introduction to NMR spectroscopy of proteins

the random coil values The signal observed at –2 ppm in the spectrum of lysozyme is from a one of the gamma methylene protons of isoleucine 98 This is shifted more than 3 ppm upfield from the random coil position at 1 48 ppm (Table 1) due to the proximity of a tryptophan residue Determination of secondary structure from chemical shift analysis

13C-NMR

carbons present: CH0 at 145 ppm and CH2 at 29 ppm are negative, while CH3 at 16 ppm and CH in the range of 126-129 ppm are positive Thus Cc and Cb are negative, while Ca, Cd, Ce, and Cf are positive

Analyse spectrale Spectres de RMN du proton

Spectres de RMN du proton à l'aide de tables de s Identifier les protons Le massif de pics situé au déplacement chimique 1,25 ppm se présente sous la

NMR SOLVENTS Deuterated Solvents for NMR