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Related Concept Videos

Nitrosation of Enols01:19

Nitrosation of Enols

8.2K
The nitrosation reaction is one of the methods of preparing 1,2-diketones. The enol tautomer of the starting ketone reacts with sodium nitrite in hydrochloric acid, generating the 1,2-diketone after hydrolysis.
8.2K
Rate-Determining Steps03:08

Rate-Determining Steps

36.4K
Relating Reaction Mechanisms
In a multistep reaction mechanism, one of the elementary steps progresses significantly slower than the others. This slowest step is called the rate-limiting step (or rate-determining step). A reaction cannot proceed faster than its slowest step, and hence, the rate-determining step limits the overall reaction rate.
The concept of rate-determining step can be understood from the analogy of a 4-lane freeway with a short-stretch of traffic-bottleneck caused due to...
36.4K
Oxidation of Alkenes: Anti Dihydroxylation with Peroxy Acids02:04

Oxidation of Alkenes: Anti Dihydroxylation with Peroxy Acids

7.1K
Diols are compounds with two hydroxyl groups. In addition to syn dihydroxylation, diols can also be synthesized through the process of anti dihydroxylation. The process involves treating an alkene with a peroxycarboxylic acid to form an epoxide. Epoxides are highly strained three-membered rings with oxygen and two carbons occupying the corners of an equilateral triangle. This step is followed by ring-opening of the epoxide in the presence of an aqueous acid to give a trans diol.
7.1K
Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide02:44

Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide

12.4K
Alkenes are converted to 1,2-diols or glycols through a process called dihydroxylation. It involves the addition of two hydroxyl groups across the double bond with two different stereochemical approaches, namely anti and syn. Dihydroxylation using osmium tetroxide progresses with syn stereochemistry.
12.4K
1° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Mechanism01:37

1° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Mechanism

4.7K
Nitrous acid is a relatively weak and unstable acid prepared in situ by the reaction of sodium nitrite and cold, dilute hydrochloric acid. In an acidic solution, the nitrous acid undergoes protonation when it loses water to form a nitrosonium ion—an electrophile. Nitrous acid reacts with primary amines to give diazonium salts. The reaction is called diazotization of primary amines.
4.7K
Aldehydes and Ketones with HCN: Cyanohydrin Formation Mechanism01:10

Aldehydes and Ketones with HCN: Cyanohydrin Formation Mechanism

4.1K
Cyanohydrins are formed when cyanide nucleophiles and carbonyl compounds like aldehydes and ketones react. A strong base, the cyanide ion, catalyzes cyanohydrin formation. The ions are generated from HCN under aqueous conditions. Once the cyanide ions are generated, the first step involves the nucleophilic attack of the cyanide ions on the electrophilic carbonyl carbon. This attack shifts the π electrons from the C=O to the oxygen atom forming the alkoxide ion intermediate. The alkoxide anion...
4.1K

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Related Experiment Videos

Nitroalkane oxidase: Structure and mechanism.

Paul F Fitzpatrick1

  • 1Department of Biochemistry and Structural Biology, The University of Texas Health Science Center, San Antonio, TX 78229, USA.

Archives of Biochemistry and Biophysics
|May 23, 2017
PubMed
Summary
This summary is machine-generated.

Nitroalkane oxidase oxidizes nitroalkanes to aldehydes or ketones, producing nitrite and hydrogen peroxide. Detailed solution and structural analyses reveal the enzyme's catalytic mechanism.

Keywords:
FlavoproteinMechanismNitroalkane oxidaseNitronate monooxygenaseStructure

Related Experiment Videos

Area of Science:

  • Biochemistry
  • Enzymology
  • Structural Biology

Background:

  • Nitroalkane oxidase is a flavoprotein enzyme.
  • It catalyzes the oxidation of neutral nitroalkanes.
  • The reaction produces aldehydes or ketones, nitrite, and hydrogen peroxide.

Purpose of the Study:

  • To elucidate the catalytic mechanism of nitroalkane oxidase.
  • To understand the enzyme's function in nitroalkane metabolism.

Main Methods:

  • Solution analyses
  • Structural analyses (e.g., X-ray crystallography, NMR spectroscopy)
  • Biochemical assays

Main Results:

  • Detailed mechanistic insights into nitroalkane oxidation.
  • Structural basis for substrate binding and catalysis.
  • Identification of key active site residues and their roles.

Conclusions:

  • The study provides a comprehensive understanding of nitroalkane oxidase function.
  • Mechanism involves electron transfer to oxygen, forming hydrogen peroxide.
  • Findings contribute to the broader field of flavoprotein enzymology.