Which of the Following Statements Is (Are) True About the IR

question 39

Multiple Choice

Which of the following statements is (are) true about the IR spectrum of the compound drawn below?

• A) It shows absorptions at 3000-3150 cm^-1 and 1720 cm^-1.
• B) It shows absorptions at 3000-2850 cm^-1 and 2150 cm^-1.
• C) It shows absorptions at 2250 cm^-1 and 1650 cm^-1.
• D) It shows absorptions at 2250 cm^-1 and 1720 cm^-1.
• E) Both statements B (It shows absorptions at 3000-2850 cm^-1 and 2250 cm^-1) and D (It shows absorptions at 2250 cm^-1 and 1720 cm^-1) are true.

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Definitions:

Quaternary

Refers to the fourth-order structure in chemistry or the presence of four different groups attached to a central carbon atom.

Proton Spin Decoupled

A technique used in NMR spectroscopy where the interaction between different hydrogen nuclei ("spin coupling") is removed, simplifying the spectrum.

NMR Spectra

The graphical representation obtained from nuclear magnetic resonance spectroscopy, which provides detailed information about the structure of molecules.

Frequency

The number of cycles or waves per unit of time, often used in the context of electromagnetic radiation or sound waves.