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Chapter 12: 40E (page 385)

Carvone (Problem 12-39) has an intense infrared absorption at . What kind of ketone does carvone contain?

Short Answer

Expert verified

Ketone is a cyclic conjugated ketone

Step by step solution

01

Definition of Infrared absorption

Infrared is the electromagnetic waves that are irradiated on the compound to identify the strength of the chemical bonds present within the compound.

The absorption of the infrared radiation termed infrared absorption

This method helps us to determine exchangeable atoms.

02

Carvone

Carvone belongs to the family of terpenoids. These are the chemicals found naturally in essential oil but most abundantly in the oils from the seeds of dill and many others.

03

Infrared absorption

The range would be of C=C and that of indicates that the ketone is cyclic conjugated ketone as from the formula, we calculated that O is present.

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Most popular questions from this chapter

Question: How might you use IR spectroscopy to distinguish between the following pairs of isomers?

a)CH3CH2OHandCH3OCH3b)cyclohexaneand1-hexenec)CH3CH2CO2HandHOCH2CH2CHO

Propose structures for simple molecules that contain the following functional groups:

(a)Alcohol (b)Aromatic ring (c)Carboxylic acid (d)Amine (e)Both ketone and amine

(f) Two double bonds

Question: Propose structures for compounds that meet the following descriptions:

(a)C5H8with IR absorptions at 3300 and 2150cm-1

(b)C4H8Owith a strong IR absorption at 3400cm-1

(c) C4H8Owith a strong IR absorption at 1715 cm-1

(d) C8H10with IR absorptions at 1600 and 1500cm-1

One consequence of the base-catalyzed isomerization of unsaturated ketones described in Problem 22-55 is that 2-substituted 2-cyclopentenones can be interconverted with 5-substituted 2-cyclopentenones. Propose a mechanism for this isomerization.

Propose structures for compounds that fit the following mass-spectraldata:

(a) A hydrocarbon with M+= 132

(b) A hydrocarbon with M+=166

(c) A hydrocarbon with M+= 84
See all solutions

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