In the following practice problems, we will go over efficient strategies for solving IR spectroscopy problems. Yes, IR spectra look overwhelming at first, as there are so many peaks, but knowing where to pay attention makes it a lot easier to figure out the functional groups present and identify the correct structure.
Check also this post on solving NMR practice problems step-by-step!
NMR Spectroscopy-Carbon-Dept-IR Practice Problems
Complete the following IR spectroscopy table by assigning the correct frequency, placed in random order and position, to each functional group and structural unit: Molecule A is shown as an example.
In the following IR practice problems, we will identify the compound consistent with the IR absorption peaks following three simple steps.
Label the functional groups and identify the correct compound based on the IR spectrum.
This is a 35-min video solution to all the 12 IR practice problems available to CS Prime members. Join Chemistry Steps today and get an instant access to all the answers and solutions for Organic I and II including over 10-hours of problem-solving videos.
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By joining Chemistry Steps, you will gain instant access to the answers and solutions for all the Practice Problems, including over 40 hours of problem-solving videos, Multiple-Choice Quizzes, Puzzles, Reaction Maps, and the powerful set of Organic Chemistry 1 and 2 Summary Study Guides.
Label the functional groups and identify the correct compound based on the IR spectrum.
Label the functional groups and identify the correct compound based on the IR spectrum.
Label the functional groups and identify the correct compound based on the IR spectrum.
This content is for registered users only.
By joining Chemistry Steps, you will gain instant access to the answers and solutions for all the Practice Problems, including over 40 hours of problem-solving videos, Multiple-Choice Quizzes, Puzzles, Reaction Maps, and the powerful set of Organic Chemistry 1 and 2 Summary Study Guides.
Label the functional groups and identify the correct compound based on the IR spectrum.
This content is for registered users only.
By joining Chemistry Steps, you will gain instant access to the answers and solutions for all the Practice Problems, including over 40 hours of problem-solving videos, Multiple-Choice Quizzes, Puzzles, Reaction Maps, and the powerful set of Organic Chemistry 1 and 2 Summary Study Guides.
Label the functional groups and identify the correct compound based on the IR spectrum.
This content is for registered users only.
By joining Chemistry Steps, you will gain instant access to the answers and solutions for all the Practice Problems, including over 40 hours of problem-solving videos, Multiple-Choice Quizzes, Puzzles, Reaction Maps, and the powerful set of Organic Chemistry 1 and 2 Summary Study Guides.
Label the functional groups and identify the correct compound based on the IR spectrum.
This content is for registered users only.
By joining Chemistry Steps, you will gain instant access to the answers and solutions for all the Practice Problems, including over 40 hours of problem-solving videos, Multiple-Choice Quizzes, Puzzles, Reaction Maps, and the powerful set of Organic Chemistry 1 and 2 Summary Study Guides.
Label the functional groups and identify the correct compound based on the IR spectrum.
This content is for registered users only.
By joining Chemistry Steps, you will gain instant access to the answers and solutions for all the Practice Problems, including over 40 hours of problem-solving videos, Multiple-Choice Quizzes, Puzzles, Reaction Maps, and the powerful set of Organic Chemistry 1 and 2 Summary Study Guides.
Label the functional groups and identify the correct compound based on the IR spectrum.
This content is for registered users only.
By joining Chemistry Steps, you will gain instant access to the answers and solutions for all the Practice Problems, including over 40 hours of problem-solving videos, Multiple-Choice Quizzes, Puzzles, Reaction Maps, and the powerful set of Organic Chemistry 1 and 2 Summary Study Guides.
Label the functional groups and identify the correct compound based on the IR spectrum.
This content is for registered users only.
By joining Chemistry Steps, you will gain instant access to the answers and solutions for all the Practice Problems, including over 40 hours of problem-solving videos, Multiple-Choice Quizzes, Puzzles, Reaction Maps, and the powerful set of Organic Chemistry 1 and 2 Summary Study Guides.
Label the functional groups and identify the correct compound based on the IR spectrum.
This content is for registered users only.
By joining Chemistry Steps, you will gain instant access to the answers and solutions for all the Practice Problems, including over 40 hours of problem-solving videos, Multiple-Choice Quizzes, Puzzles, Reaction Maps, and the powerful set of Organic Chemistry 1 and 2 Summary Study Guides.
Label the functional groups and identify the correct compound based on the IR spectrum.
Additional Practice Problems combined with Mass Spectrometry are available to CS members here.
This content is for registered users only.
By joining Chemistry Steps, you will gain instant access to the answers and solutions for all the Practice Problems, including over 40 hours of problem-solving videos, Multiple-Choice Quizzes, Puzzles, Reaction Maps, and the powerful set of Organic Chemistry 1 and 2 Summary Study Guides.
Check Also
IR, MS, and NMR Combined Problems
Can you post more of these?
I will have it on the list. Meanwhile, you can download the Study Guides under your account and there is a file on solving IR problems that may also help you on the way.
New set of practice problems combining IR, Mass spectrometry, and NMR spectroscopy are available to CS members here.
Any one have solution to the question that not have answer above? Please help me
it’s wonderful
Thank you! I suddenly feel like IR is something simple that I could’ve known better earlier in the semester.
Appreciate it! You made IR easy.
Good stuff to work on! Do you have more ochem practice problems?
Thank you all for your feedback!
Thank You!! Appreciate it!
Hello, can you please give the name of the functional group of no. 3. Thanks
Hello Sheina,
“a” is an alkene, the rest are alkynes and only “b” contains an OH as well which is an alcohol. You can find more about the functional groups here: Functional Groups in Organic Chemistry.
Thanks. But what I mean is that the answer to number 3 is letter E and I want to know the IUPAC name for that.
Oh, that should be one of the simplest alkynes to name – Naming Alkynes by IUPAC Nomenclature Rules
Dear sir,
I am PhD guide in Pharmaceuticals in academics , shall i get complementary registration,
I am requesting you give for same, i will use this for Education research only
Ok👍