Related Experiment Video
Updated: Jun 6, 2026

Synthesis of Near-Infrared Emitting Gold Nanoclusters for Biological Applications
Published on: March 22, 2020
[(C3H4N2)2Au]Cl--a bis protic gold(I)-NHC
Peter C Kunz1, Corinna Wetzel, Susanne Kögel
1Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-University Düsseldorf, Universitätsstr. 1, D-40225, Düsseldorf, Germany. peter.kunz@uni-duesseldorf.de
A novel gold(I) bis-N-heterocyclic carbene compound was synthesized efficiently. This water-soluble compound demonstrates stability in concentrated hydrochloric acid.
Area of Science:
- Inorganic Chemistry
- Organometallic Chemistry
Background:
- N-heterocyclic carbenes (NHCs) are versatile ligands in organometallic chemistry.
- Gold(I) complexes with NHC ligands have shown promising applications.
Purpose of the Study:
- To synthesize and characterize a parent gold(I) bis-NHC compound.
- To evaluate the solubility and stability of the synthesized compound.
Main Methods:
- A three-step synthesis starting from imidazole.
- Characterization of the gold(I) bis-NHC complex.
Main Results:
- The gold(I) bis-NHC parent compound was synthesized in high yield.
- The compound exhibits high water solubility.
- The compound is stable in concentrated hydrochloric acid.
Conclusions:
- A facile and high-yield synthetic route to a water-soluble gold(I) bis-NHC complex was established.
- The compound's stability profile suggests potential for applications in acidic aqueous media.
Related Concept Videos
Chirality at Nitrogen, Phosphorus, and Sulfur
A consequence of chirality is the need for enantiomeric resolution. While this is theoretically possible for all...
Structures 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.
The three sp2 orbitals of the carbonyl carbon form three σ bonds, one each with the carbonyl oxygen, the α carbon, and the heteroatom, whereas the other two sp2 orbitals of the carbonyl oxygen are occupied by the lone pairs. Further, the unhybridized p...
2° Amines to N-Nitrosamines: Reaction with NaNO2
Prochirality
Electrophilic Addition to Alkynes: Halogenation
Halogenation is another class of electrophilic addition reactions where a halogen molecule gets added across a π bond. In alkynes, the presence of two π bonds allows for the addition of two equivalents of halogens (bromine or chlorine). The addition of the first halogen molecule forms a trans-dihaloalkene as the major product and the cis isomer as the minor product. Subsequent addition of the second equivalent yields the tetrahalide.

