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Related Concept Videos

Formation of Complex Ions03:45

Formation of Complex Ions

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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...
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Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
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Complexation Equilibria: The Chelate Effect01:19

Complexation Equilibria: The Chelate Effect

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In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...
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Structural Isomerism02:34

Structural Isomerism

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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...
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Complexation Equilibria: Overview01:23

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Complexation reactions take place when dative or coordinate covalent bonds form between metal ions and ligands. The compounds formed in these reactions are called coordination compounds. The number of bonds formed between the metal ion and the ligands is called its coordination number. Generally, most metal ions in an aqueous solution are solvated by water molecules and thus exist as aqua complexes.
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EDTA: Auxiliary Complexing Reagents01:26

EDTA: Auxiliary Complexing Reagents

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EDTA titrations are usually carried out in highly basic conditions, where the fully deprotonated form of EDTA, Y4−, actively complexes with the free metal ions in the solution. Several metal ions precipitate as hydrous oxide (hydroxides, oxides, or oxyhydroxides) under these conditions, lowering the concentration of free metal ions in the solution. For this reason, auxiliary complexing agents or ligands such as ammonia, tartrate, citrate, or triethanolamine are used in EDTA titrations to...
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Correction: Simple synthetic access to [Au(IBiox)Cl] complexes.

Ekaterina A Martynova1, Marco Zuccarello2, Domenic Kronenberg2

  • 1Department of Chemistry and Centre for Sustainable Chemistry, Ghent University, Krijgslaan 281, S-3, 9000 Ghent, Belgium. steven.nolan@ugent.be.

Dalton Transactions (Cambridge, England : 2003)
|April 24, 2024
PubMed
Summary

This correction clarifies the synthesis of gold(I) complexes with imidazole-based N-heterocyclic carbenes (NHCs). The corrected information ensures accurate reporting of synthetic procedures and characterization data for these valuable organometallic compounds.

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Area of Science:

  • Organometallic Chemistry
  • Coordination Chemistry
  • Synthetic Chemistry

Context:

  • The original publication detailed the synthesis of gold(I) complexes featuring imidazole-based N-heterocyclic carbenes (NHCs).
  • Accurate synthetic and characterization data are crucial for reproducibility and further research in gold chemistry.

Purpose:

  • To provide a formal correction to the previously published article 'Simple synthetic access to [Au(IBiox)Cl] complexes'.
  • To rectify any inaccuracies in the synthetic methods, characterization, or data presentation.
  • To ensure the scientific record is accurate for the gold(I)-NHC complexes discussed.

Summary:

  • This correction addresses errors in the original publication concerning the synthesis of gold(I) complexes with imidazole-based N-heterocyclic carbenes (NHCs).
  • Specific details regarding synthetic procedures, reaction conditions, or analytical data have been revised for accuracy.
  • The correction ensures the reliable accessibility and characterization of these organometallic gold compounds.

Impact:

  • Ensures the integrity of the scientific literature on gold(I)-NHC complexes.
  • Facilitates correct understanding and replication of synthetic routes by researchers.
  • Supports ongoing investigations into the properties and applications of gold-NHC complexes in catalysis and medicine.