Related Experiment Video
Updated: Dec 10, 2025
19:58
Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions
Published on: July 30, 2017
10.0K
Retraction Note to: Mononuclear Cu Complexes Based on Nitrogen Heterocyclic Carbene: A Comprehensive Review
Sina Matavos-Aramyan1, Sadaf Soukhakian2, Mohammad Hossein Jazebizadeh2
1Research and Development Department, Division of Chemistry, Raazi Environmental Protection Foundation, Shiraz, Iran. matavos@repf.info.
Topics in Current Chemistry (Cham)
|September 3, 2020
Summary
This study has been retracted because the authors did not respond to publisher communications regarding the retraction. Further details on the scientific findings are unavailable due to the retraction.
Area of Science:
- Scientific publishing ethics
- Retraction notices
Background:
- This abstract concerns a retraction notice.
- The specific reasons for the retraction are not detailed beyond author non-response.
Purpose of the Study:
- To inform the scientific community about the retraction of a previously published study.
- To document the lack of author engagement with the publisher regarding this retraction.
Main Methods:
- Publisher initiated communication with authors regarding concerns.
- Authors failed to respond to multiple correspondence attempts.
Main Results:
- The study has been officially retracted.
- No author response was received by the publisher.
Conclusions:
- The retraction is finalized due to non-responsiveness.
- Further scientific insights from the original study cannot be provided.
Related Concept Videos
01:32Aldehydes and Ketones with HCN: Cyanohydrin Formation Overview
3.6K
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...
3.6K
01:18Aromatic Hydrocarbon Cations: Structural Overview
3.5K
Cycloheptatriene is a neutral monocyclic unsaturated hydrocarbon that consists of an odd number of carbon atoms and an intervening sp3 carbon in the ring. The three double bonds in the ring correspond to 6 π electrons, which is a Huckel number, and therefore satisfies the criteria of 4n + 2 π electrons. However, the intervening sp3 carbon disrupts the continuous overlap of p orbitals. As a result, cycloheptatriene is not aromatic.
Removing one hydrogen from the intervening CH2 group...
Removing one hydrogen from the intervening CH2 group...
3.5K
01:10Aldehydes 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
02:54Coordination Compounds and Nomenclature
25.3K
In most main group element compounds, the valence electrons of the isolated atoms combine to form chemical bonds that satisfy the octet rule. For instance, the four valence electrons of carbon overlap with electrons from four hydrogen atoms to form CH4. The one valence electron leaves sodium and adds to the seven valence electrons of chlorine to form the ionic formula unit NaCl (Figure 1a). Transition metals do not normally bond in this fashion. They primarily form coordinate covalent bonds, a...
25.3K
01:12Preparation 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...
2.5K
02:30Chirality at Nitrogen, Phosphorus, and Sulfur
6.7K
Chirality is most prevalent in carbon-based tetrahedral compounds, but this important facet of molecular symmetry extends to sp3-hybridized nitrogen, phosphorus and sulfur centers, including trivalent molecules with lone pairs. Here, the lone pair behaves as a functional group in addition to the other three substituents to form an analogous tetrahedral center that can be chiral.
A consequence of chirality is the need for enantiomeric resolution. While this is theoretically possible for all...
A consequence of chirality is the need for enantiomeric resolution. While this is theoretically possible for all...
6.7K