Ch. 15 - Analytical Techniques: IR, NMR, Mass SpectWorksheetSee all chapters
All Chapters
Ch. 1 - A Review of General Chemistry
Ch. 2 - Molecular Representations
Ch. 3 - Acids and Bases
Ch. 4 - Alkanes and Cycloalkanes
Ch. 5 - Chirality
Ch. 6 - Thermodynamics and Kinetics
Ch. 7 - Substitution Reactions
Ch. 8 - Elimination Reactions
Ch. 9 - Alkenes and Alkynes
Ch. 10 - Addition Reactions
Ch. 11 - Radical Reactions
Ch. 12 - Alcohols, Ethers, Epoxides and Thiols
Ch. 13 - Alcohols and Carbonyl Compounds
Ch. 14 - Synthetic Techniques
Ch. 15 - Analytical Techniques: IR, NMR, Mass Spect
Ch. 16 - Conjugated Systems
Ch. 17 - Aromaticity
Ch. 18 - Reactions of Aromatics: EAS and Beyond
Ch. 19 - Aldehydes and Ketones: Nucleophilic Addition
Ch. 20 - Carboxylic Acid Derivatives: NAS
Ch. 21 - Enolate Chemistry: Reactions at the Alpha-Carbon
Ch. 22 - Condensation Chemistry
Ch. 23 - Amines
Ch. 24 - Carbohydrates
Ch. 25 - Phenols
Ch. 26 - Amino Acids, Peptides, and Proteins

Solution: For the following reaction, which of the following change(s) in the IR spectrum is consistent with conversion of the reactant to the product? a. absorption at 2150 cm -1 should disappear  b. absorption at 3300 cm -1 and 2150 cm -1 should disappear  c. absorption at 2250 cm -1 should disappear, a new absorption at 3300 cm -1 should appear  d. absorption at 1650 cm -1 should disappear, a new absorption at 3300 cm -1 should appear e. absorption at 3300 cm -1 and 2150 cm -1 should disappear, a new absorption at 1720 cm -1 should appear

Problem

For the following reaction, which of the following change(s) in the IR spectrum is consistent with conversion of the reactant to the product?

a. absorption at 2150 cm -1 should disappear 
b. absorption at 3300 cm -1 and 2150 cm -1 should disappear 
c. absorption at 2250 cm -1 should disappear, a new absorption at 3300 cm -1 should appear 
d. absorption at 1650 cm -1 should disappear, a new absorption at 3300 cm -1 should appear
e. absorption at 3300 cm -1 and 2150 cm -1 should disappear, a new absorption at 1720 cm -1 should appear