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Related Concept Videos

Ethers from Alcohols: Alcohol Dehydration and Williamson Ether Synthesis02:29

Ethers from Alcohols: Alcohol Dehydration and Williamson Ether Synthesis

11.0K
Overview
Ethers can be prepared from organic compounds by various methods. Some of them are discussed below,
Preparation of Ethers by Alcohol Dehydration
In this method, in the presence of protic acids, alcohol dehydrates to produce alkenes and ethers under different conditions. For example, in the presence of sulphuric acid, dehydration of ethanol at 413 K yields ethoxyethane, whereas it yields ethene at 443 K.
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Acid-Catalyzed Dehydration of Alcohols to Alkenes02:35

Acid-Catalyzed Dehydration of Alcohols to Alkenes

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In a dehydration reaction, a hydroxyl group in an alcohol is eliminated along with the hydrogen from an adjacent carbon. Here, the products are an alkene and a molecule of water. Dehydration of alcohols is generally achieved by heating in the presence of an acid catalyst. While the dehydration of primary alcohols requires high temperatures and acid concentrations, secondary and tertiary alcohols can lose a water molecule under relatively mild conditions.
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Aldehydes and Ketones with Alcohols: Hemiacetal Formation01:19

Aldehydes and Ketones with Alcohols: Hemiacetal Formation

8.2K
Similar to water, alcohols can add to the carbonyl carbon of the aldehydes and ketones. The addition of one molecule of alcohol to the carbonyl compound forms the hemiacetal or half acetal. As depicted below, in a hemiacetal, the carbon is directly linked to an OH and OR group.
8.2K
Mass Spectrometry: Alcohol Fragmentation01:03

Mass Spectrometry: Alcohol Fragmentation

4.7K
Alcohols (R-OH) ionize to lose one non-bonded electron from the oxygen atom, forming molecular ions. Due to their tendency to fragment rapidly, the intensity of the molecular ion peak in the mass spectrum is weak or sometimes absent. The fragmentation patterns for alcohols occur in two ways, i.e. ⍺-cleavage and dehydration. During ⍺-cleavage, the bond at the ⍺-position adjacent to the hydroxyl group cleaves to give a resonance-stabilized cation and a radical. However,...
4.7K
CNS Depressants: Alcohol and Nicotine01:27

CNS Depressants: Alcohol and Nicotine

1.7K
Ethanol, a clear colorless alcohol, has been consumed by humans for millennia, but its effects on the body are far from benign. At lower doses, it induces decreased inhibitions and loquaciousness, leading to its social appeal. However, it can cause severe consequences at higher doses, such as coma and respiratory depression, due to its zero-order elimination kinetics. Chronic ethanol abuse wreaks havoc on multiple organ systems, particularly the CNS and the liver. Abrupt cessation of ethanol...
1.7K
Depressants01:28

Depressants

668
Depressant drugs, including alcohol and sedative-hypnotics, diminish central nervous system activity by enhancing the action of gamma-aminobutyric acid (GABA), a neurotransmitter that reduces brain activity and promotes relaxation. These substances can have various therapeutic uses but also pose significant risks, especially when misused or combined.
Alcohol is a common depressant that can induce a sense of relaxation and reduced inhibition at low doses. Contrary to its occasional...
668

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Related Experiment Video

Updated: May 1, 2026

A Prediction Error-driven Retrieval Procedure for Destabilizing and Rewriting Maladaptive Reward Memories in Hazardous Drinkers
08:05

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The alcohol hangover.

J G Wiese1, M G Shlipak, W S Browner

  • 1Veterans Affairs Medical Center and the University of California, San Francisco 94121, USA.

Annals of Internal Medicine
|June 3, 2000
PubMed
Summary
This summary is machine-generated.

Alcohol hangover causes significant societal costs and health risks, impacting cognitive and physical performance. Effective treatments like rehydration and medication can alleviate symptoms and potentially aid in detecting alcohol dependency.

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Area of Science:

  • Medical Research
  • Toxicology
  • Public Health

Background:

  • Alcohol hangover is a common condition with significant morbidity and societal costs.
  • Symptoms include headache, fatigue, and cognitive impairment, posing risks even with normal blood alcohol levels.

Purpose of the Study:

  • To review the causes, pathophysiology, costs, and treatments of alcohol-induced hangover.
  • To synthesize current knowledge on hangover for clinical and public health applications.

Main Methods:

  • Comprehensive literature search of MEDLINE (1966-1999) and bibliographies.
  • Review and extraction of data from experimental, clinical, and basic research studies.

Main Results:

  • Hangover symptoms stem from dehydration, hormonal changes, and alcohol's toxic effects, leading to impaired performance and potential cardiac risks.
  • Annual costs in the US exceed $148 billion due to absenteeism and poor job performance, primarily from light-to-moderate drinkers.
  • Effective interventions include rehydration, prostaglandin inhibitors, and vitamin B6, with screening aiding alcohol dependency detection.

Conclusions:

  • Alcohol hangover is a prevalent disorder with substantial health and economic consequences.
  • Appropriate management strategies can effectively relieve hangover symptoms for many individuals.