There is long-standing interest in nonaqueous uranium chemistry because of fundamental questions about uranium’s variable chemical bonding and the similarities of this pseudo-Group 6 element to its congener d-block elements molybdenum and tungsten. To provide historical context, with reference to a conference presentation slide presented around 1988 that advanced a defining collection of top targets, and the challenge, for synthetic actinide chemistry to realize in isolable complexes under normal experimental conditions, this Viewpoint surveys progress against those targets, including (i) CO and related π-acid ligand complexes, (ii) alkylidenes, carbynes, and carbidos, (iii) imidos and terminal nitrides, (iv) homoleptic polyalkyls, -alkoxides, and -aryloxides, (v) uranium–uranium bonds, and (vi) examples of topics that can be regarded as branching out in parallel from the leading targets. Having summarized advances from the past four decades, opportunities to build on that progress, and hence possible future directions for the field, are highlighted. The wealth and diversity of uranium chemistry that is described emphasizes the importance of ligand–metal complementarity in developing exciting new chemistry that builds our knowledge and understanding of elements in a relativistic regime.

中文翻译：

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非水分子铀化学进展：下一步何去何从？


由于有关铀可变化学键的基本问题以及这种伪第 6 族元素与其同族 d 区元素钼和钨的相似性，人们对非水铀化学长期以来一直很感兴趣。为了提供历史背景，参考 1988 年左右提出的会议演示幻灯片，该幻灯片提出了一系列重要目标的定义，以及合成锕系化学在正常实验条件下在可分离配合物中实现的挑战，本观点调查了这些目标的进展情况，包括（i）CO和相关的π酸配体配合物，（ii）亚烷基，卡宾和卡比多，（iii）酰亚胺和末端氮化物，（iv）均配聚烷基，-醇盐和-芳基氧化物，（v）铀-铀债券，以及（vi）可被视为从主要目标并行分支的主题示例。总结了过去四十年的进展，强调了在这一进展的基础上再接再厉的机会，以及该领域未来可能的方向。所描述的铀化学的丰富性和多样性强调了配体-金属互补性在开发令人兴奋的新化学中的重要性，这些新化学建立了我们对相对论体系中元素的知识和理解。