Redox hemilabile ligand

A. L. Terthienyl and Poly-terthienyl Ligands as Redox-Switchable Hemilabile Ligands for Oxidation-State-Dependent Molecular Uptake and Release. J. Am. Chem. Soc. 2001, 123, 2503-2516. 

The problem raised by the deactivation of vacant site could be solved by the design of a protective device such as a redox-switchabk hemilabile ligand, RHL [62]. Ideally, the protective device should (1) be activated by an electronic (redox) or chemical (pH) instruction, (2) open the binding site only in the presence of the substrate, (3) function reversibly so that the site is protected back when the bound substrate is lost (due to reversibility of the binding step or due to decoordination during subsequent steps). An example of an electrochemically... 

A method that utilizes the weak-link synthetic approach and hemilabile ligands, e.g., Al,Af -dimethyl-lV, -his[2-(diphenylphosphino)ethyl]-l,4-phenylenediamine, derived from M(V,ArAt -tetramethyl-l,4-phenylenediamine (Wurster s reagent), was used to prepare a new class of flexible, redox-active binuclear macrocycles <01IC2940>. 

The terthienyl ligand of the ruthenium complex 15 is recognized as a redox-switchable hemilabile ligand (Scheme 3.8). ... 

D. A. Weinberger, T. B. Higgins, C. A. Mirkin, L. M. Liable-Sands and A. L. Rheingold, Terthienyl-based redox-switchable hemilabile ligands transition metal polymeric complexes with electrochemically tunable or switchable coordination environments, Angew. Chem. Int. Ed., 38, 2565-2568 (1999). 

Using a series of new coordination compounds of some platinum group metals with potentially hemilabile redox-active chelate ligands based on the o-benzosemiquinoneimine intermediate, the extent of noninnocent behavior has been established experimentally, via structure determination and EPR, UV-vis-NIR spectroelectrochemistry [35, 36], and computationally... 

---