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Properties of Organometallic Compounds01:23

Properties of Organometallic Compounds

1.5K
Organometallic compounds are compounds that contain a carbon–metal bond. Carbon belongs to an organyl group like alkyl, aryl, allyl, or benzyl groups. The metal can be from Group I or Group II of the periodic table, a transition metal, or a semimetal.
1.5K
Structural Isomerism02:34

Structural Isomerism

21.2K
Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can...
21.2K
Aldehydes and Ketones with HCN: Cyanohydrin Formation Mechanism01:10

Aldehydes and Ketones with HCN: Cyanohydrin Formation Mechanism

4.0K
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...
4.0K
Aldehydes and Ketones with HCN: Cyanohydrin Formation Overview01:32

Aldehydes and Ketones with HCN: Cyanohydrin Formation Overview

3.7K
Cyanohydrins are compounds that contain –CN and –OH groups on the same carbon atom. They are formed by the nucleophilic addition of the cyanide ions to the carbonyl group. Cyanide ions are highly basic and nucleophilic and can be generated from HCN under aqueous conditions. However, since HCN is a weak acid, the number of cyanide ions generated is very small. Hence, a small amount of base or KCN/NaCN is added to HCN to increase the concentration of the cyanide ions in the reaction...
3.7K
Formation of Complex Ions03:45

Formation of Complex Ions

25.3K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
25.3K
Preparation of Nitriles01:12

Preparation of Nitriles

2.5K
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...
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Synthesis of Hypervalent Iodonium Alkynyl Triflates for the Application of Generating Cyanocarbenes
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Metalated isocyanides: formation, structure, and reactivity.

Bilal Altundas1, John-Paul R Marrazzo1, Fraser F Fleming1

  • 1Chemistry, Drexel University, Philadelphia, Pennsylvania, USA. fleming@drexel.edu.

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Metalated isocyanides offer dual reactivity for synthesizing nitrogenous heterocycles. Understanding their structure-reactivity relationship is key to advancing complex organic synthesis.

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Area of Science:

  • Organometallic Chemistry
  • Organic Synthesis
  • Heterocyclic Chemistry

Background:

  • Metalated isocyanides are versatile organometallic compounds.
  • They possess two distinct reactive carbon centers, enabling unique chemical transformations.
  • Their application in synthesizing nitrogenous heterocycles is significant.

Purpose of the Study:

  • To provide a foundational understanding of metalated isocyanides.
  • To survey the formation, structure, and properties of these compounds.
  • To elucidate the interplay between structure and reactivity for complex bond constructions.

Main Methods:

  • Review of existing literature on metalated isocyanides.
  • Analysis of structural features influencing reactivity.
  • Survey of synthetic methodologies employing metalated isocyanides.

Main Results:

  • Metalated isocyanides exhibit dual reactivity due to two orthogonally reactive carbons.
  • Nucleophilic attack on π-electrophiles leads to cyclization, forming diverse nitrogenous heterocycles.
  • Empirical heuristics have guided their application, highlighting a need for foundational understanding.

Conclusions:

  • A comprehensive understanding of metalated isocyanide structure-reactivity is crucial.
  • This knowledge will facilitate the development of novel synthetic strategies.
  • These compounds are exceptional nucleophiles for complex organic bond constructions.