The IR and proton NMR of compound C12H18 shown below.A) what is it U value?B) How many equivalent H’s per molecule are responsible for singlet peak at 1.35 ppm in the proton NMRC) How many equivalent H’s per molecule are responsible for singlet peak at 2.35 ppmD) Draw the structure base on the Ir and NMr ## Proton NMR Spectrum AnalysisThe image displays a Proton Nuclear Magnetic Resonance (NMR) spectrum, which is a common analytical technique used to determine the structure of organic compounds. Below are the details of the spectrum and an explanation of each component:### Spectrum Graph Interpretation:- **X-Axis (Horizontal Axis)**: The x-axis represents the chemical shift in parts per million (PPM). It ranges from approximately 0 to 8 PPM. Each marked interval on this scale corresponds to the frequency at which different hydrogen atoms in the compound resonate.- **Peaks and Their Identification**: There are three main peaks labeled as A, B, and C: - **Peak A (0.9 PPM)**: - Intensity: Major peak with the largest height. - Label: Marked as "A." - Multiplicity: Suggests the presence of a single type of proton environment, possibly a methyl group (–CH₃). - Note: Located at around 0.9 PPM, typical for an alkyl group. - **Peak B (2.2 PPM)**: - Intensity: Moderate height. - Label: Marked as "B." - Multiplicity: Represents a different proton environment, possibly indicative of a methylene group (–CH₂–) near an electronegative atom or functional group. - Note: Located at around 2.2 PPM, which is consistent with protons adjacent to a carbonyl group (–CO–). - **Peak C (7.5 PPM)**: - Intensity: The smallest peak among the three but easily noticeable. - Label: Marked as "C." - Multiplicity: Suggests the presence of aromatic protons. - Note: Located at around 7.5 PPM, typical for aromatic or benzene ring protons.### Graphical Elements:- **Wave numbers (Top Axis)**: This axis, marked from 3500 to 1000, does not typically relate to the NMR spectrum directly. It likely represents a redundant overlay from an Infrared (IR) spectrum, which uses wave numbers for frequency identification in IR spectroscopy. This is extraneous information for the NMR spectrum being discussed. - **Intensity and Integration**: The intensity of each peak correlates with the number of protons that cause the signal. Peaks with annotations "1 ### Understanding Infrared Spectroscopy GraphInfrared spectroscopy is a powerful analytical technique used to identify different functional groups in molecules by examining how they absorb infrared light. The graph above is an example of an infrared (IR) spectrum, which plots the percent transmittance against the wavenumber (in cm^-1).#### Graph Details:1. **X-Axis (Wavenumber in cm^-1)**: - The x-axis represents the wavenumber, which is inversely proportional to wavelength. It typically ranges from around 4000 cm^-1 to 500 cm^-1. Specific absorption bands occur at characteristic wavenumbers, helping to identify functional groups within the sample.2. **Y-Axis (Percent Transmittance)**: - The y-axis shows the percent transmittance. It indicates how much of the infrared light passes through the sample and is detected by the spectrometer. A transmittance of 100% means no absorption, while a lower percentage means higher absorption.3. **Absorption Peaks**: - The peaks (downward deflections) on the graph indicate specific wavenumbers where the sample absorbs infrared light. Each peak corresponds to a particular vibration mode of a molecule or a functional group. - Peak labels (shown in the image) report the specific wavenumber of significant absorption regions as follows: - 2924.22 cm^-1 - 2853.47 cm^-1 - 2098.59 cm^-1 - 2010.17 cm^-1 - 1777.59 cm^-1 - 1604.96 cm^-1 - 1510.45 cm^-1 - 1382.12 cm^-1 - 1220.81 cm^-1 - 1130.17 cm^-1 - 1049.69 cm^-1 - 906.80 cm^-1 - 802.08 cm^-1 - 788.01 cm^-1#### Interpreting the Graph:- **Broad Absorption around 3400 cm^-1**: - If present, often indicates O-H stretching (common in alcohols and acids).- **Sharp Peaks in the 3000 cm^-1 Region**: - Typically associated with C-H stretching (includes different types like sp^3, sp

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Answered: The IR and proton NMR of compound…

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...