**Lab Section:** __________________**Name:** __________________---# Write-Up Sheet for Proton NMR Spectroscopy Experiment## DATA & ANALYSIS**Unknown Number:** ____________________Attach the unknown ¹H NMR spectrum you were assigned to this sheet. ---### QUESTIONS1) Draw the structure of your unknown below and assign the spectrum. That is, label each different peak in the spectrum with a letter (e.g. a, b, c, etc.) and place the letter on the structure you drew near the hydrogens or sets of hydrogens responsible for the peak. See the course pack for a discussion of how to "assign" a spectrum and a worked example.This document serves as a worksheet for students conducting proton NMR spectroscopy experiments. Students are expected to draw and label the structures of assigned unknown compounds, correlate the peaks in the NMR spectrum with specific hydrogen atoms or groups of hydrogen atoms in their structure, and learn the process of spectral assignment through practical application. ## Hydrogen Nuclear Magnetic Resonance (H-NMR) Spectrum of Unknown #25 (C₁₀H₁₂O)### OverviewThis H-NMR spectrum corresponds to an unknown compound with the molecular formula C₁₀H₁₂O. The graph highlights the chemical shift, measured in parts per million (ppm), along with the integration and splitting patterns of the hydrogen atoms.### Key Features of the Spectrum:1. **Peak at ~7.1-7.9 ppm (2H each)** - **Description:** There are multiplet peaks in the region between 7.1 and 7.9 ppm. - **Protons:** These peaks correspond to four hydrogen atoms (2H each peak). - **Interpretation:** The chemical shifts in this region typically indicate the presence of aromatic hydrogens, which are hydrogens attached to a benzene ring.2. **Peak at ~2.5-2.8 ppm (2H Quartet)** - **Description:** A quartet peak is observed around 2.5 to 2.8 ppm. - **Protons:** This peak corresponds to two hydrogen atoms. - **Interpretation:** This chemical shift is indicative of hydrogens adjacent to a deshielding group, likely in a region adjacent to an oxygen atom or double bond.3. **Peak at ~1.1 ppm (3H Triplet)** - **Description:** A triplet peak is observed around 1.1 ppm. - **Protons:** This peak corresponds to three hydrogen atoms. - **Interpretation:** This shift typically indicates the presence of a methyl group (CH₃). The triplet pattern suggests that these hydrogens are next to a CH₂ group.4. **Peak at ~2.1 ppm (3H Singlet)** - **Description:** There is a singlet peak around 2.1 ppm. - **Protons:** This peak corresponds to three hydrogen atoms. - **Interpretation:** This chemical shift and singlet pattern often indicate the presence of methyl hydrogens adjacent to an oxygen or double bond (such as CH₃ adjacent to a carbonyl group).### AnalysisFrom the spectrum, one can deduce that the compound contains:- Aromatic hydrogen atoms (~7.1-7.9 ppm).- A CH₂ group adjacent to a des

Given: The molecular formula of the compound is C10H12O. The 1H NMR of the compound is,

1) Draw the structure of your unknown below and ussign the spectrum. That is, label each different peak in the spoctrum with a letter (eg, a, b, c, etc.) and place the letter on the structure you drew near the hydrogens or sets of hydrogens responsible for the peak. See the course pack for a discussion of how to "assign' u spectrum und a worked exumple.

1) Draw the structure of your unknown below and ussign the spectrum. That is, label each different peak in the spoctrum with a letter (eg, a, b, c, etc.) and place the letter on the structure you drew near the hydrogens or sets of hydrogens responsible for the peak. See the course pack for a discussion of how to "assign' u spectrum und a worked exumple.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Assigning Spectra: The peak at 0.9 ppm is a doublet, integrating to 6. Assign this peak to a fragment (Which statement is most correct?) * 20 10 ppm R2-CH-CH2-C(=0)-OR. Based on shift it could be a CH2 near carbonyl, with one neighboring proton. R2-CH-CH3. Could be a standard methyl, with one neighboring proton. O R-CH2-CH3. Could be a standard R-CH3, with 2 neighboring protons. RO-CH(R)-CH3. Could be standard methyl, with beta substituent, and one neighboring proton.
Identify the following spectra. Assign all pertinent peaks (~5-6 peaks). Place the structure of the compound in the box on the lower left-hand corner of spectrum. Please give explanation and draw on diagram as well, thank you
Based on the spectra provided, draw the structure. Label each unique carbon and hydrogen with the letters A, B, C… for use in assigning NMR peaks. fill in the data table assigning peaks in each spectrum. You should assign: • All 1H NMR peaks • Significant IR peaks above 1600 cm Example of what the table should include (imagine the structure of ethanol is drawn with the CH3 hydrogens labeled as A, the CH2 hydrogens labeled as B, and the OH hydrogen labeled as C) : hydrogen proton chemical shift integration splitting pattern couples to.. A 1.2 3 triplet B B 3.7 2 quartet A C 2.6 1 singlet -
Identify the following spectra. Assign all pertinent peaks (~5-6 peaks). Place the structure of the compound in the box on the lower left-hand corner of the spectrum. circle spectrum on graph
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Signature: Q1. For each of the following molecules, determine how many signals you would expect to see in an ¹H-NMR spectrum of the molecule. Additionally, label each of the hydrogen atoms (A, B, C, ...) such that those in the same chemical environment are given the same designation and determine the expected splitting for all protons (s, d, t, q, m etc.). a. b. Q2. How many 13C signals would you expect for the following compounds? a. LOH b. CI H
Identify the following spectra. Assign all pertinent peaks (~5-6 peaks). Place the structure of the compound in the box on the lower left-hand corner of spectrum. .
help please answer in text form with proper workings and explanation for each and every part and steps with concept and introduction no AI no copy paste remember answer must be in proper format with all working
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Identify the following spectra. Assign all pertinent peaks (~5-6 peaks). Place the structure of the compound in the box on the lower left-hand corner of spectrum. Please give explanation and draw on diagram as well, thank you