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Related Concept Videos

Organic Compounds03:02

Organic Compounds

All living things are formed mostly of carbon compounds called organic compounds. The category of organic compounds includes both natural and synthetic compounds that contain carbon. Although a single, precise definition has yet to be identified by the chemistry community, most agree that a defining trait of organic molecules is the presence of carbon as the principal element, bonded to hydrogen and other carbon atoms. However, some carbon-containing compounds such as carbonates, cyanides, and...
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Polyprotic Acids

Acids are classified by the number of protons per molecule that they can give up in a reaction. Acids such as HCl, HNO3, and HCN that contain one ionizable hydrogen atom in each molecule are called monoprotic acids. Their reactions with water are:
Acid Strength and Molecular Structure03:05

Acid Strength and Molecular Structure

Binary Acids and Bases
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Structures of Carboxylic Acid Derivatives01:28

Structures of Carboxylic Acid Derivatives

Structure of Carboxylic Acid Derivatives
Carboxylic acid derivatives contain an acyl group attached to a heteroatom such as chlorine, oxygen, or nitrogen. The carbonyl carbon and oxygen are both sp2-hybridized with an unhybridized p orbital.
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Radical Reactivity: Steric Effects01:10

Radical Reactivity: Steric Effects

The presence of electron-donating, electron-withdrawing, or conjugating groups adjacent to a radical center, imparts electronic stabilization to the radicals. Examples of such electronically-stabilized radicals are triphenylmethyl, tetramethylpiperidine‐N‐oxide, and 2,2‐diphenyl‐1‐picrylhydrazyl. These radicals are remarkably stable and are known as persistent radicals. Some of the persistent radicals can even be isolated and purified.
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Complexation Equilibria: Factors Influencing Stability of Complexes

In complexation reactions, metal cations are the electron pair acceptors, and the ligands are the electron pair donors. The stability of the metal complexes depends primarily on the complexing ability of the central metal ion and the nature of the ligands. Generally, the complexing ability of the metal ion depends on the size and charge of the ion. As the metal ion size increases, the stability of the metal complexes decreases, provided that the valency of the metal ion and the ligands remain...

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Stable (amino)(phosphino)carbenes: difunctional molecules.

Nathalie Merceron1, Karinne Miqueu, Antoine Baceiredo

  • 1Laboratoire d'Hétérochimie Fondamentale et Appliquée, UMR 5069, Université Paul Sabatier, 118 route de Narbonne, F-31062 Toulouse Cédex 04, France.

Journal of the American Chemical Society
|June 13, 2002
PubMed
Summary

Stable (amino)(phosphino)carbenes are synthesized via nitrogen lone pair donation. These molecules offer selective reactivity at both carbene and phosphorus centers, enabling the creation of novel hybrid ligands.

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Area of Science:

  • Organometallic Chemistry
  • Ligand Design
  • Carbene Chemistry

Background:

  • The study focuses on (amino)(phosphino)carbenes, a class of difunctional molecules.
  • These carbenes exhibit unique stability attributed to the nitrogen lone pair donation.

Purpose of the Study:

  • To explore the synthesis and reactivity of (amino)(phosphino)carbenes.
  • To investigate their potential as hybrid ligands in coordination chemistry.

Main Methods:

  • Synthesis of novel (amino)(phosphino)carbene compounds.
  • Characterization of their structural and electronic properties.
  • Exploration of selective reactions at carbene and phosphorus centers.

Main Results:

  • Stable (amino)(phosphino)carbenes were successfully synthesized.
  • The phosphino group was observed to remain strongly pyramidalized.
  • Selective reactions at both the carbene and phosphorus centers were achieved, leading to new stable carbene derivatives.

Conclusions:

  • (Amino)(phosphino)carbenes represent a versatile class of compounds with tunable reactivity.
  • Their difunctional nature makes them valuable as hybrid ligands for various applications in catalysis and materials science.