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 NMR Features

Additional Problems
NMR stands for ____________________   ____________________   ____________________ .
Each signal produced in an NMR spectra has 3 variables. Those variables are  ___ . A) Signal strength, signal splitting and signal height B) Signal strength, signal shift and signal height C) Signal shift, signal splitting and signal strength D) Signal shift, signal splitting and signal integration
The coupling constant (J) for bromoethane is 7 Hz when the  1H NMR spectrum is acquired at 250 MHz. What is the coupling constant between these protons when the spectrum is acquired at 500 MHz?  a) 14 Hz b) 7 Hz c) 3.5 Hz d) 21 Hz e) none of these
The following questions pertain to the charting of NMR spectra. MATCH a term to each description below. Place the letter of the term in the blank to the right of the description.  a. TMS b. high-field or upfield side c. MHz d. delta δ e. low-field or downfield side f. chemical shift g. specific absorption   i. When looking at an NMR chart the right-hand part of the chart is the ____. ii. The exact place on the chart at which a nucleus absorbs is called its ____. iii. The calibration standard for  1H and  13C NMR is: iv. The NMR charts are calibrated using an arbitrary scale that is divided into ____ units.
Which of the following statements regarding NMR spectroscopy is wrong? a) NMR signals towards the left of the spectral chart correspond to larger chemical shifts. b) Chemical shifts are larger when the frequencies of the radiation which induces the nuclear transitions are higher. c) Chemical shifts are larger when shielding effects are greater. d) A hydrogen signal splits into n+1 peaks by spin-spin coupling when the number of equivalent hydrogen atoms on adjacent atom(s) is n, and no other neighbouring atoms are involved.
Which aspect of  1H NMR spectrum gives information about other nearby protons? a. number of different signals b. degree of shielding c. intensities of peaks d. splitting of signals e. degree of deshielding