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首页> 外文期刊>Coordination chemistry reviews >Transition metal complexes supported by highly basic imidazolin-2-iminato and imidazolin-2-imine N-donor ligands
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Transition metal complexes supported by highly basic imidazolin-2-iminato and imidazolin-2-imine N-donor ligands

机译：高度碱性咪唑啉-2-亚氨基和咪唑啉-2-亚胺的N-供体配体支持的过渡金属配合物

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摘要

Imidazolin-2-imines represent a particularly basic and nucleophilic subclass of guanidines, and a large variety of these N-donor ligands have become available, inter alia, by the reaction of N-heterocydic carbenes of the imidazolin-2-ylidene-type with organic azides such as trimethylsilyl azide followed by desilylation. These imidazolin-2-imines serve as precursors for the generation of anionic imidazolin-2-iminato ligands (imidazolin-2-imides), which act as imido-type ligands towards early transition metals and metals in a higher oxidation state and were used as ancillary ligands in a number of homogeneous catalysts, in particular for olefin polymerization and alkyne metathesis. Furthermore, these ligands also form strong metal-nitrogen bonds in lanthanide and actinide complexes. Linking the imidazolin-2-imines to each other or to other functional moieties affords multidentate ligands, and their rich coordination and bioinorganic chemistry developed mainly in the past 10 years comprises almost any transition metal. In addition to a detailed account of the chemistry of imidazolin-2-imides and -imines, the transition and main group element chemistry of their 4,5-dihydro congeners, imidazoli'dm-2-imides and -imines, is also addressed.
机译：咪唑啉-2-亚胺代表胍的特别碱性和亲核的亚类，并且尤其是通过咪唑啉-2-亚烷基型的N-杂环卡宾与N-杂环卡宾的反应，可获得许多这些N-供体配体。有机叠氮化物，例如三甲基硅烷基叠氮化物，然后进行甲硅烷基化。这些咪唑啉-2-亚胺用作产生阴离子咪唑啉-2-亚胺基配体（咪唑啉-2-亚胺）的前体，其充当早期过渡金属和较高氧化态金属的亚氨基型配体，并用作许多均相催化剂中的辅助配体，尤其用于烯烃聚合和炔烃复分解。此外，这些配体还在镧系元素和act系元素络合物中形成牢固的金属-氮键。将咪唑啉-2-亚胺彼此或与其他功能性部分连接可得到多齿配体，并且它们在过去十年中发展起来的丰富的配位和生物无机化学几乎包括任何过渡金属。除了详细说明咪唑啉-2-酰亚胺和-亚胺的化学外，还讨论了其4,5-二氢同类物，咪唑啉dm-2-酰亚胺和-亚胺的过渡态和主族元素化学。

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