IR and NMR spectroscopy

Flashcard
•
Chemistry
•
12th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is IR spectroscopy?
Back
Infrared (IR) spectroscopy is an analytical technique used to identify and study chemicals based on the absorption of infrared light, which causes molecular vibrations.
2.
FLASHCARD QUESTION
Front
What does a sharp peak at around 1750 cm⁻¹ in an IR spectrum indicate?
Back
A sharp peak at around 1750 cm⁻¹ typically indicates the presence of a carbonyl group (C=O), commonly found in ketones and aldehydes.
3.
FLASHCARD QUESTION
Front
What is the molecular formula for 2-pentanone?
Back
The molecular formula for 2-pentanone is C₅H₁₀O.
4.
FLASHCARD QUESTION
Front
How can NMR spectroscopy be used to identify a compound?
Back
NMR spectroscopy provides information about the number of hydrogen atoms in different environments, helping to deduce the structure of the compound.
5.
FLASHCARD QUESTION
Front
What is the significance of the molecular formula C₄H₈O₂ in organic chemistry?
Back
The molecular formula C₄H₈O₂ suggests the presence of functional groups such as carboxylic acids or esters, which can be identified using IR spectroscopy.
6.
FLASHCARD QUESTION
Front
What type of functional group is indicated by a peak around 1700 cm⁻¹ in IR spectroscopy?
Back
A peak around 1700 cm⁻¹ typically indicates the presence of a carbonyl group (C=O), which is characteristic of ketones, aldehydes, and carboxylic acids.
7.
FLASHCARD QUESTION
Front
What is the role of chemical shifts in NMR spectroscopy?
Back
Chemical shifts in NMR spectroscopy indicate the electronic environment of hydrogen atoms, allowing for the determination of molecular structure.
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