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Core - Analytical Chemistry

    Chapter 16

    Advanced Nuclear Magnetic Resonance Spectroscopy

    16.1 : ¹H NMR of Conformationally Flexible Molecules: Temporal Resolution00:52

    16.1 : ¹H NMR of Conformationally Flexible Molecules: Temporal Resolution

    At room temperature, the chair conformer of cyclohexane undergoes rapid ring flipping between two equivalent chair conformers at a rate of approximately ...

    807 views
    16.2 : ¹H NMR of Conformationally Flexible Molecules: Variable-Temperature NMR01:15

    16.2 : ¹H NMR of Conformationally Flexible Molecules: Variable-Temperature NMR

    The axial and equatorial protons in cyclohexane can be distinguished by performing a variable-temperature NMR experiment. In this process, except for one ...

    1.1K views
    16.3 : ¹H NMR of Labile Protons: Temporal Resolution01:10

    16.3 : ¹H NMR of Labile Protons: Temporal Resolution

    Protons bonded to heteroatoms such as nitrogen and oxygen exhibit a range of chemical shift values. This is due to the varying degree of hydrogen bonding ...

    1.1K views
    16.4 : ¹H NMR of Labile Protons: Deuterium (²H) Substitution00:48

    16.4 : ¹H NMR of Labile Protons: Deuterium (²H) Substitution

    This lesson illustrates the role of deuterium substitution in simplifying the NMR spectrum of compounds comprising labile protons. One method employed is ...

    876 views
    16.5 : Nuclear Overhauser Enhancement (NOE)01:07

    16.5 : Nuclear Overhauser Enhancement (NOE)

    Irradiation of a spin-active nucleus causes an increase or decrease in the signal intensity of neighboring nuclei that are not necessarily chemically ...

    635 views
    16.6 : Insensitive Nuclei Enhanced by Polarization Transfer (INEPT)01:15

    16.6 : Insensitive Nuclei Enhanced by Polarization Transfer (INEPT)

    Insensitive Nuclei Enhanced by Polarization Transfer (INEPT) is an advanced Nuclear Magnetic Resonance (NMR) technique specifically designed to detect and ...

    244 views
    16.7 : Double Resonance Techniques: Overview01:12

    16.7 : Double Resonance Techniques: Overview

    Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or ...

    191 views
    16.8 : Two-Dimensional (2D) NMR: Overview01:12

    16.8 : Two-Dimensional (2D) NMR: Overview

    The 1D NMR spectrum of large and complex molecules like natural products has complicated splitting patterns and overlapping signals, which can be easily ...

    619 views
    16.9 : 2D NMR: Overview of Homonuclear Correlation Techniques01:16

    16.9 : 2D NMR: Overview of Homonuclear Correlation Techniques

    Homonuclear correlation spectroscopy (COSY) is a powerful technique used in Nuclear Magnetic Resonance (NMR) spectroscopy to study the correlations ...

    171 views
    16.10 : 2D NMR: Homonuclear Correlation Spectroscopy (COSY)01:06

    16.10 : 2D NMR: Homonuclear Correlation Spectroscopy (COSY)

    Homonuclear correlation spectroscopy, or COSY, is a 2-dimensional NMR technique that provides information about coupled protons. Typically, the geminal ...

    955 views
    16.11 : 2D NMR: Overview of Heteronuclear Correlation Techniques01:18

    16.11 : 2D NMR: Overview of Heteronuclear Correlation Techniques

    Heteronuclear correlation spectroscopy is an analytical technique that investigates the coupling between different types of nuclei, often a proton and an ...

    157 views
    16.12 : 2D NMR: Heteronuclear Single-Quantum Correlation Spectroscopy (HSQC)01:19

    16.12 : 2D NMR: Heteronuclear Single-Quantum Correlation Spectroscopy (HSQC)

    Heteronuclear single-quantum correlation spectroscopy (HSQC) is a 2D NMR technique that reveals one-bond correlations between hydrogen and a ...

    639 views
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