Sketch the signals you would expect to see for H꜀ in the molecule shown. The important coupling constants are given.

Verified step by step guidance

1. Identify the hydrogen atoms in the molecule that are relevant to the problem. Determine which hydrogen atoms are chemically equivalent and which are not.
2. Consider the coupling constants provided. These constants indicate the splitting pattern of the NMR signals due to the interaction between neighboring hydrogen atoms.
3. Use the coupling constants to predict the multiplicity of each signal. For example, a coupling constant between two hydrogen atoms might result in a doublet, triplet, or other splitting pattern.
4. Sketch the expected NMR signals for each hydrogen atom based on their chemical environment and the coupling constants. Consider factors such as chemical shift, multiplicity, and intensity.
5. Review the sketch to ensure that all expected signals are accounted for and that the splitting patterns match the provided coupling constants. Make any necessary adjustments to the sketch.

Key Concepts

NMR Spectroscopy

Nuclear Magnetic Resonance (NMR) spectroscopy is a technique used to determine the structure of organic compounds by observing the magnetic properties of atomic nuclei. In the context of hydrogen (proton) NMR, it provides information about the number of hydrogen atoms, their environment, and how they interact with neighboring atoms, which is crucial for sketching expected signals.

Chemical Shift

Chemical shift refers to the position of an NMR signal relative to a standard reference compound, typically tetramethylsilane (TMS). It indicates the electronic environment surrounding a nucleus, with shifts affected by factors such as electronegativity and hybridization. Understanding chemical shifts helps predict where signals will appear in the NMR spectrum for different hydrogen atoms in a molecule.

Spin-Spin Coupling

Spin-spin coupling, or J-coupling, occurs when magnetic interactions between neighboring nuclei split NMR signals into multiple peaks. The coupling constant, measured in Hertz, quantifies the interaction strength and helps determine the multiplicity of signals. Recognizing coupling patterns is essential for sketching the expected NMR signals for hydrogen atoms in a molecule.