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Related Concept Videos

EDTA: Chemistry and Properties01:22

EDTA: Chemistry and Properties

Polydentate ligands are most widely used in complexometric titrations because they form more stable complexes with the metal ions than mono- or bidentate ligands due to the chelate effect. Examples of polydentate ligands are ethylenediaminetetraacetic acid (EDTA), crown ethers, and cryptands. The most important feature of optimal polydentate ligands is the ability to form 1:1 complexes in a single-step process. Amino carboxylic acid derivatives are frequently used as complexing agents. EDTA is...
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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...
Aryldiazonium Salts to Azo Dyes: Diazo Coupling01:11

Aryldiazonium Salts to Azo Dyes: Diazo Coupling

The reaction of weakly electrophilic aryldiazonium (also called arenediazonium) salts with highly activated aromatic compounds leads to the formation of products with an —N=N— link, called an azo linkage. This reaction, presented in Figure 1, is known as diazo coupling and occurs without the loss of the nitrogen atoms of the aryldiazonium salt. Highly activated aromatic compounds such as phenols or arylamines favor the diazo coupling reaction. The coupling generally occurs at the para position.

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Amide Coupling Reaction for the Synthesis of Bispyridine-based Ligands and Their Complexation to Platinum as Dinuclear Anticancer Agents
07:20

Amide Coupling Reaction for the Synthesis of Bispyridine-based Ligands and Their Complexation to Platinum as Dinuclear Anticancer Agents

Published on: May 28, 2014

Tris(pyrazolyl)methane and 1,8-naphthalimide-functionalized dialkynylgold(I) anionic complexes.

Daniel L Reger1, Mark D Smith, Radu F Semeniuc

  • 1Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC 29208, USA.

Acta Crystallographica. Section C, Crystal Structure Communications
|September 6, 2013
PubMed
Summary

Two new gold compounds featuring alkyne ligands were synthesized. These compounds utilize tris(pyrazolyl)methane and naphthalimide functional groups, forming unique bridged structures with gold(I).

Keywords:
1,8-naphthalimidescrystal structuregold complexesscorpionates

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Published on: April 10, 2015

Area of Science:

  • Organometallic Chemistry
  • Coordination Chemistry
  • Supramolecular Chemistry

Background:

  • Gold(I) complexes are versatile in catalysis and materials science.
  • Alkyne ligands offer unique reactivity and structural possibilities in organometallic chemistry.
  • Tris(pyrazolyl)methane and naphthalimide are important functional groups in ligand design.

Purpose of the Study:

  • To synthesize and characterize novel gold(I) compounds with alkyne-functionalized ligands.
  • To explore the structural diversity and coordination modes of gold complexes incorporating tris(pyrazolyl)methane and naphthalimide moieties.
  • To investigate the self-assembly and crystal packing of these new gold compounds.

Main Methods:

  • Reaction of tetrapropylammonium bis(acetylacetonato)gold(I) with alkyne derivatives.
  • Synthesis of compounds featuring tris(pyrazolyl)methane and 1,8-naphthalimide functional groups.
  • X-ray crystallography for structural determination of the new gold complexes.

Main Results:

  • Two new gold(I) compounds were successfully synthesized, both featuring a linear C≡C-Au-C≡C spacer.
  • One compound incorporates tris(pyrazolyl)methane ligands, while the other contains 1,8-naphthalimide units.
  • The crystal structure of the naphthalimide compound revealed π-π stacking interactions forming a 3D network with solvent channels.

Conclusions:

  • The study demonstrates the successful synthesis of novel gold(I) complexes with complex alkyne ligands.
  • The diverse coordination behavior of gold(I) with these functionalized ligands was highlighted.
  • The crystal packing analysis provides insights into supramolecular assembly driven by π-π interactions.