Discrete metal complexes from N-heterocyclic ferrocenes: Structural diversity by ligand design

Abstract

The aim of this review is to provide an overview of the structures of discrete metal complexes with N-heterocyclic ferrocenes, based on their crystal structures. These N-heterocyclic ferrocenes act as versatile ligands for the construction of metal complexes with unique structures, owing to the π•••π interaction between the N-heterocycles and conformational flexibility of the ferrocenyl moiety.N-Heterocyclic ferrocenes coordinate to metal ions in monodentate, C,N-bidentate, multidentate, and bridging fashions, which results in metal complexes with various M:L stoichiometry. The ligands and their metal complexes have been recently employed for applications including chemical sensors, homogeneous catalysts, and redox-driven conformational switching.

Coordination Behaviour of 1-(4,2′:6′,4′′-terpyridin-4′-yl)ferrocene and 1-(3,2′:6′,3′′-terpyridin-4′-yl)ferrocene: Predictable and Unpredictable Assembly Algorithms

“…However, competitive assembly processes are indicated by a report [41] of the 1D-coordination polymer [{ZnCl2(3)} . 1.5H2O]n but no details of synthesis are available. (Fig.…”

“…An analogous packing motif is present in [{ZnCl2(3)} . 1.5H2O]n, but this structure has not been discussed in detail. [41] 18 …”

“…[1] Materials incorporating 2 ferrocene-building blocks can show interesting magnetic and electrochemical properties, in particular in multimetallic polymers. [2,3] A recent example from Kraatz and coworkers demonstrates that using a ferrocene substituent in an artificial peptide produces a versatile, redox-responsive material.…”

Electrochemical transformations and evaluation of antioxidant activity of some Schiff bases containing ferrocenyl and (thio‐)phenol, catechol fragments

“…The great attention to ferrocene and its derivatives deals with the possibility to use these compounds in different areas of chemical sciences including coordination, bioorganometallic and medicinal chemistry . The ferrocenyl derivatives have a wide range of application in catalysis, construction of magneto‐active substances, molecular switches and devices, optical materials, and as ligands in coordination chemistry . The interest to the investigation of redox properties of ferrocenyl‐containing compounds is associated with the possibility of the electron transfer process between chemically different redox active building blocks.…”

“…[1] The ferrocenyl derivatives have a wide range of application in catalysis, [2][3][4] construction of magneto-active substances, molecular switches and devices, [5,6] optical materials, [7][8][9] and as ligands in coordination chemistry. [10][11][12] The interest to the investigation of redox properties of ferrocenyl-containing compounds is associated with the possibility of the electron transfer process between chemically different redox active building blocks. From this perspective, one of intriguing research area is redox-asymmetric systems containing a combination of phenolate, cathecholate (hydroquinolate), semiquinonate or benzoquinone moieties with ferrocenyl group.…”