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

Concept #1: General Features of IR Spect

Additional Problems
The infrared spectrum of 1-hexyne exhibits a sharp absorption peak near 2100 cm -1 due to C≡C streching. However, 3-hexyne shows no absorption in that region. Explain.  
Which of the following information is primarily obtained from infrared spectroscopy? a) conjugated π system present in a compound b) arrangement of carbon and hydrogen atoms in a compound c) functional groups present in a compound d) molecular weight of a compound e) all of these
Which of the following bonds is IR inactive (i.e. will *not* give a signal on an IR chart)? a) I & IV b) I & III c) II d) III e) I
Specify the missing compounds and/or reagents in each of the following syntheses: (c) Chemical reactions rarely yield products in such initially pure form that no trace can be found of the starting materials used to make them. What evidence in an IR spectrum of each of the crude (unpurified) products from the above reactions would indicate the presence of one of the organic reactants used to synthesize each target molecule? That is, predict one or two key IR absorptions for the reactants that would distinguish it/them from IR absorptions predicted for the product.  
All of the following molecules contain a carbon-carbon double bond functional group. However, not all carbon-carbon double bonds are detected by infrared (IR) spectroscopy. CIRCLE those molecules that CANNOT be "seen" by an IR.
Which of the following is primarily obtained from IR spectroscopy:   A) Arrangement of C and H atoms in compound B) Molecular weight of compound  C) Conjugated π-system  D) Functional groups present in compound  E) All of these
Which of the following bonds would show the strongest absoprtion in an IR spect. graph? A. carbon-hydrogen B. oxygen-hydrogen C. nitrogen-hydrogen D. sulfur-hydrogen
List the two limitations to Infrared Spectroscopy. 
Which types of bonds would be considered Infrared-inactive?