Due to their high basicity, guanidines are versatile ligand systems. In principal, they could use both their imino and amino nitrogen to establish a dative metal-N bond. However, generally only the imino N of a guanidine ligand is bound to a metal. Herein we present some examples in which both the imino and amino groups of guanidine ligands are directly engaged in the bonding to a metal ion. Under
由于其高碱性,胍是多功能配体系统。原则上,他们可以同时使用亚氨基和氨基氮来建立金属-N 键。然而,通常只有胍配体的亚氨基 N 与金属结合。在本文中,我们展示了一些例子,其中胍配体的亚氨基和氨基都直接参与与金属离子的键合。在某些条件下,氨基可以与作为半稳定配体的金属中心建立额外的连接。该结果可能与催化反应相关,证明了稳定金属空位的可能性(例如由配体解离产生)。