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Updated: May 26, 2025

Preparation and Reactivity of a Triphosphenium Bromide Salt: A Convenient and Stable Source of PhosphorusI
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在PEEK和树脂水泥之间进行粘合的Diazonium化学

Saadet Atsu1, Ahmed Saad2, Faleh Tamimi3

  • 1Visiting Professor, Department of Mining and Materials Engineering, Faculty of Dental Medicine and Oral Health Sciences, McGill University, Montreal, Quebec, Canada; and Professor, Department of Prosthodontics, Faculty of Dentistry, University of Kırıkkale, Kırıkkale, Turkey.

The Journal of prosthetic dentistry
|February 22, 2025
PubMed
概括

聚乙基 (PEEK) 表面与二氧化反应的原始化显著增强了对树脂水泥的粘附性. 这种表面处理提高了粘合强度,提供了更好的修复材料性能.

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Diazonium Group Substitution: –OH and –H01:19

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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...
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Arenediazonium substitution reactions occur when the diazonium group is substituted by various functional groups such as halides, hydroxyl, nitrile, etc. For instance, arenediazonium salts react with copper(I) salts of chloride, bromide, or cyanide to form corresponding aryl chlorides, bromides, and nitriles. These reactions are named Sandmeyer reactions. Although the mechanism of this reaction is complicated, as illustrated in Figure 1, they are believed to progress via an aryl copper...
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Nitrous acid is a relatively weak and unstable acid prepared in situ by the reaction of sodium nitrite and cold, dilute hydrochloric acid. In an acidic solution, the nitrous acid undergoes protonation when it loses water to form a nitrosonium ion—an electrophile. Nitrous acid reacts with primary amines to give diazonium salts. The reaction is called diazotization of primary amines.
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