Cover Feature: Enantiomerically Pure Tetravalent Neptunium Amidinates: Synthesis and Characterization (Chem. Eur. J. 41/2020)

Fichter, Sebastian; Kaufmann, Sebastian; Kaden, Peter; Brunner, Tobias S.; Stumpf, Thorsten; Roesky, Peter W.; März, Juliane

doi:10.1002/chem.202003032

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“…Surprisingly, the combination of ferrocene as a versatile ligand scaffold and amidinates, which are a widely used class of ligands for almost all metals of the periodic table ranging from Li to Np, − is strongly underdeveloped. Only a few compounds have been reported with amidinate-functionalized ferrocenes so far, and even fewer with disubstituted ferrocenes. ,− In coinage metal chemistry, amidinates tend to coordinate in a metal bridging mode, forming an {(amidinate)M 2 (amidinate)} metal core (Figure , left) if weakly bound leaving groups are coordinated to the metal precursor.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Coordination Chemistry of a Bisamidinate Ferrocene Ligand with Cu, Ag, and Au

et al. 2022

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The coordination chemistry of a ferrocene ligand with one bulky amidinate function attached to each ring toward two different coinage metal precursors was investigated. In dependence of the metal and the co-ligands, "ansa" type structures and non-bridged structures were obtained. Six different compounds are reported. In the "ansa" type structures, short Fe−M (M = Cu, Ag) distances were observed in the molecular structures in the solid state. However, theoretical calculations (DFT) did not reveal a stabilizing metal− metal interaction. Instead, dispersion interactions within the ligand and between the ligand and metal seem to represent the main stabilization forces.

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