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Chapter 24: Problem 84

If a molecule is an "ene-one," what functional groups must it have?

Short Answer

Expert verified
An "ene-one" molecule must contain both an alkene functional group (-C=C-) and a ketone functional group (-C(=O)-) as part of its structure.

Step by step solution

01

Understand what "ene-one" means

To identify the functional groups in an "ene-one" molecule, we need to understand the meaning of "ene" and "one." The term "ene" typically refers to an alkene, which consists of a carbon-carbon double bond. On the other hand, "one" refers to a ketone, which contains a carbonyl group connected to two other carbons.
02

Identify the functional groups for alkenes

In an alkene, the carbon-carbon double bond is the main functional group present. An alkene functional group has the general formula -C=C-.
03

Identify the functional groups for ketones

In a ketone, the main functional group is a carbonyl group, which consists of a carbon double-bonded to an oxygen atom. The general formula for a ketone functional group is -C(=O)-, where the carbonyl carbon atom is connected to two other carbon atoms.
04

Combine the functional groups for "ene-one" molecules

Now that we know the functional groups for both alkenes and ketones, we can combine them to identify the functional groups required for an "ene-one" molecule. An "ene-one" molecule must have both an alkene functional group (-C=C-) and a ketone functional group (-C(=O)-) as part of its structure. In conclusion, a molecule labeled as an "ene-one" must contain both an alkene functional group (-C=C-) and a ketone functional group (-C(=O)-).

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Most popular questions from this chapter

The protein ribonuclease A in its native, or most stable, form is folded into a compact globular shape:(a) Does the native form have a lower or higher free energy than the denatured form, in which the protein is an extended chain? (b) What is the sign of the entropy change in going from the denatured to the folded form? (c) In the native form, the molecule has four \(-\mathrm{S}-\mathrm{S}-\) bonds that bridge parts of the chain. What effect do you predict these four linkages to have on the free energy and entropy of the native form relative to the free energy and entropy of a hypothetical folded structure that does not have any \(-\mathrm{S}-\mathrm{S}-\) linkages? Explain. \((\mathrm{d})\) A gentle reducing agent converts the four \(-\mathrm{S}-\mathrm{S}-\) linkages in ribonuclease \(A\) to eight \(-S-H\) bonds. What effect do you predict this conversion to have on the tertiary structure and entropy of the protein? (e) Which amino acid must be present for \(-\mathrm{SH}\) bonds to exist in ribonuclease \(\mathrm{A}\) ?

(a) One test for the presence of an alkene is to add a small amount of bromine, a red-brown liquid, and look for the disappearance of the red-brown color. This test does not work for detecting the presence of an aromatic hydrocarbon. Explain. (b) Write a series of reactions leading to para-bromoethylbenzene, beginning with benzene and using other reagents as needed. What isomeric side products might also be formed?

Glutathione is a tripeptide found in most living cells. Partial hydrolysis yields Cys-Gly and Glu-Cys. What structures are possible for glutathione?

Draw the condensed structures of the compounds formed from (a) butanoic acid and methanol, (b) benzoic acid and 2-propanol, (c) propanoic acid and dimethylamine. Name the compound in each case.

Draw the structure for 2 -bromo- 2 -chloro- 3 -methylpentane, and indicate any chiral carbons in the molecule.
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