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Related Concept Videos

Preparation of Epoxides03:00

Preparation of Epoxides

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Overview
Epoxides result from alkene oxidation, which can be achieved by a) air, b) peroxy acids, c) hypochlorous acids, and d) halohydrin cyclization.
Epoxidation with Peroxy Acids
Epoxidation of alkenes via oxidation with peroxy acids involves the conversion of a carbon–carbon double bond to an epoxide using the oxidizing agent meta-chloroperoxybenzoic acid, commonly known as MCPBA. Since the O–O bond of peroxy acids is very weak, the addition of electrophilic oxygen of peroxy acids to...
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Preparation of Amides01:29

Preparation of Amides

4.1K
Amides are synthesized by treating carboxylic acids with amines in the presence of dehydrating agents like dicyclohexylcarbodiimide (DCC).
The DCC-promoted synthesis of amides begins with the protonation of DCC by carboxylic acid. The protonation makes it a better acceptor. Next, the addition of carboxylate to the protonated carbodiimide gives a reactive acylating agent.
Subsequently, the amine acts as a nucleophile that attacks the acylating agent to form a tetrahedral intermediate. In the...
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Preparation of Nitriles01:12

Preparation of Nitriles

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One of the common methods to prepare nitriles is the dehydration of amides. This method requires strong dehydrating agents like phosphorous pentoxide or boiling acetic anhydride for converting amides to nitriles. Another reagent namely, thionyl chloride also accomplishes the dehydration of amides, where amide acts as a nucleophile. The first step of the mechanism involves the nucleophilic attack by the amide on the thionyl chloride to form an intermediate. In the next step, the electron pairs...
2.7K
Preparation and Reactions of Thiols02:33

Preparation and Reactions of Thiols

7.6K
Thiols are prepared using the hydrosulfide anion as a nucleophile in a nucleophilic substitution reaction with alkyl halides. For instance, bromobutane reacts with sodium hydrosulfide to give butanethiol.
7.6K
Preparation of Acid Anhydrides01:07

Preparation of Acid Anhydrides

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One of the methods for preparing symmetrical or unsymmetrical acid anhydrides involves the treatment of acid chlorides with the sodium salt of carboxylic acids. The reaction proceeds via a nucleophilic acyl substitution.
The carboxylate ion acts as a nucleophile that attacks the carbonyl carbon of the acid chloride to form a tetrahedral intermediate. Subsequently, the re-formation of the carbonyl group with the loss of the chloride ion as a leaving group leads to the formation of an acid...
4.1K
Preparation and Reactions of Sulfides02:26

Preparation and Reactions of Sulfides

5.8K
Sulfides are the sulfur analog of ethers, just as thiols are the sulfur analog of alcohol. Like ethers, sulfides also consist of two hydrocarbon groups bonded to the central sulfur atom. Depending upon the type of groups present, sulfides can be symmetrical or asymmetrical. Symmetrical sulfides can be prepared via an SN2 reaction between 2 equivalents of an alkyl halide and one equivalent of sodium sulfide.
5.8K

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Hurricanes: Are You Prepared?

Fred H Rodriguez1, John Petersen2, Rajeevan Selvaratnam3

  • 1LSU School of Medicine, New Orleans, LA.

Laboratory Medicine
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Summary
This summary is machine-generated.

Laboratories must develop comprehensive hurricane plans to minimize disruptions from severe weather. This article outlines key elements for effective hurricane preparedness and response based on practical experience.

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Area of Science:

  • Environmental Science
  • Laboratory Management
  • Disaster Preparedness

Background:

  • Severe weather events, particularly hurricanes, pose significant risks to laboratory operations.
  • Disruptions can impact research continuity, data integrity, and safety.
  • Proactive planning is crucial for mitigating these risks.

Purpose of the Study:

  • To detail the essential components of a robust Hurricane Plan for laboratories.
  • To provide practical guidance based on real-world experiences with hurricane impacts.
  • To enhance laboratory resilience against severe weather events.

Main Methods:

  • Review of personal experiences with hurricane impacts on laboratory operations.
  • Identification and synthesis of critical elements for a comprehensive Hurricane Plan.
  • Structured documentation of best practices for preparedness and response.

Main Results:

  • A structured framework for a Hurricane Plan has been identified.
  • Key elements include risk assessment, communication strategies, data backup, and resource management.
  • The plan emphasizes proactive measures and post-event recovery protocols.

Conclusions:

  • A well-defined Hurricane Plan is essential for maintaining laboratory functionality during and after severe weather.
  • Implementing the outlined elements can significantly reduce operational disruptions and protect valuable assets.
  • Continuous review and updating of the plan are vital for sustained preparedness.