Assign each signal in the spectrum and give a brief explanation for each. Problem R-26L (C₂H₁₂) 300 MHz 'H NMR spectrum in CDCI, Source: Aldrich Spectra Collection/Reich g Hz لسلسلسسلسلسيليسيا 30 20 10 0 سلسل 1.7 1.6 1.5 1.4 ми المسلسلين 5.1 5.0 E 4.9 24 2.3 2.2 1.00 1.2 1.1 1.0 0.9 2.16 1.83 8.0 7.0 6.0 5.0 4.0 3.0 2.0 1.0 0.0 nom

Determine the multiplicity and predict the chemical shifts of each signal in the expected 1H NMR spectrum of the following compound.

7) Among the given 207 Pb NMR spectra, the correct spectrum due to tetramethyllead is (Given: 2 j207 pb-H = 60Hz) JL. l O ㅗ

Sketch the form of an A3M2X4 spectrum, where A, M, and X are protons with distinctly different chemical shifts and JAM > JAX > JMX ·

Help me find the 13C NMR spectrum of the image

Each of the IR spectra shown below is accompanied by a set of four compounds. In each case, indicate which of the four compounds is responsible for the spectrum.

Where do the stars go the nmr

(a) Calculate the energy difference between the two spin states of 1H and of 13C in a magnetic field of 6.8 T. 1H 4.0 1.91e-29 X J 13C 4.80e-33 X J (b) What is the precession frequency of a 'H nucleus at this magnetic field? Of a 13C nucleus? 1H 4.0 290 MHz 13C 4.0 73 MHz (c) At what magnetic field do protons precess at a frequency of 300. MHz? [4.0 7.04

Calculate the exact resonance frequency for the two signals of 1,3-dichloropropane B = 3.75 Cl-C- C-C- B JAB=6.2 Hz A = 2.20 TMS 90 Hz, ア 6 5 4 2 1 O ô ppm I-0-IM I-U-IA I-y-IB

YOU MUST SHOW YOUR WORK Molecular Formula: CH120 what is the proposed from the given data? IR Spectrum ΙΗ ΝMR VEMERI Signal Chemical Shift Integration 1H Multiplicity multiplet doublet of doublets Proposed Identity # Neighbors На 5.82 5.07 1H He 5.02 1H doublet of doublets singlet (exchanges) quintet triplet quintet triplet Ha 3.58 1H He 3.25 1H 1.98 2H H 1.48 2H Hi 0.9 3H 13C NMR Data 9.9, 30.7, 42.0, 74.6, 115.7, 135.1 ppm