Roaming reactions were first clearly identified in photodissociation of formaldehyde 15 years ago, and roaming dynamics are now recognized as a universal aspect of chemical reactivity. These reactions typically involve frustrated near-dissociation of a quasibound system to radical fragments, followed by reorientation at long range and intramolecular abstraction. The consequences can be unexpected formation of molecular products, depletion of the radical pool in chemical systems, and formation of products with unusual internal state distributions. In this review, I examine some current aspects of roaming reactions with an emphasis on experimental results, focusing on possible quantum effects in roaming and roaming dynamics in bimolecular systems. These considerations lead to a more inclusive definition of roaming reactions as those for which key dynamics take place at long range.

中文翻译：

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范德华地区的漫游反应和动力学。

15年前，在甲醛的光解离中首次明确识别出了漫游反应，而漫游动力学现已被认为是化学反应性的普遍方面。这些反应通常涉及拟结合系统受挫的接近解离成自由基片段，然后在远距离重新定向和分子内提取。结果可能是分子产物的意外形成，化学体系中自由基库的耗尽以及内部状态分布异常的产物的形成。在这篇综述中，我研究了漫游反应的一些当前方面，重点是实验结果，重点是双分子系统中漫游中的量子效应和漫游动力学。