The halogen-atom transfer (XAT) is one of the most important and applied processes for the generation of carbon radicals in synthetic chemistry. In this review, we summarize and highlight the most important aspects associated with XAT and the impact it has had on photochemistry and photocatalysis. The organization of the material starts with the analysis of the most important mechanistic aspects and then follows a subdivision based on the nature of the reagents used in the halogen abstraction. This review aims to provide a general overview of the fundamental concepts and main agents involved in XAT processes with the objective of offering a tool to understand and facilitate the development of new synthetic radical strategies.

中文翻译：

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卤素原子转移 (XAT) 在合成光化学和光催化中生成碳自由基的应用

卤原子转移 (XAT) 是合成化学中生成碳自由基的最重要和应用的过程之一。在这篇综述中，我们总结并强调了与 XAT 相关的最重要方面以及它对光化学和光催化的影响。材料的组织从最重要的机械方面的分析开始，然后根据卤素提取中使用的试剂的性质进行细分。本综述旨在提供 XAT 过程中涉及的基本概念和主要代理的一般概述，目的是提供一种工具来理解和促进新的合成自由基策略的开发。