scholarly journals Manganese(I)-Catalyzed H–P Bond Activation via Metal–Ligand Cooperation

2021 ◽  
Author(s):  
Juana M. Pérez ◽  
Roxana Postolache ◽  
Marta Castiñeira Reis ◽  
Esther G. Sinnema ◽  
Denisa Vargová ◽  
...  
Keyword(s):  
Bond Activation ◽  
Metal Ligand

A coordinatively unsaturated iridium complex with an unsymmetrical redox-active ligand: (spectro)electrochemical and reactivity studies

2019 ◽  
Vol 48 (37) ◽  
pp. 13931-13942 ◽  
Author(s):  
Sebastian Sobottka ◽  
Margarethe Behr van der Meer ◽  
Estelle Glais ◽  
Uta Albold ◽  
Simon Suhr ◽  
...  
Keyword(s):  
Bond Activation ◽  
Iridium Complex ◽  
Iridium Complexes ◽  
Redox Active Ligand ◽  
Active Ligand ◽  
Redox Active ◽  
Metal Ligand

Metal–ligand cooperativity can be used in iridium complexes with an unsymmetrically substituted redox-active diamidobenzene ligand for bond activation reactions.

scholarly journals Applications of bond energies of transition-metal-ligand σ-bonds inC–H bond activation

2021 ◽  
Vol 51 (2) ◽  
pp. 110-122
Author(s):  
Jin-Pei Cheng ◽  
Jun-Yan Wu ◽  
Jin-Dong Yang
Keyword(s):  
Transition Metal ◽  
Bond Activation ◽  
Bond Energies ◽  
Sigma Bonds ◽  
Metal Ligand

Metal–Ligand Cooperative Si ─ H Bond Activation

2019 ◽  
pp. 115-130
Author(s):  
Francis Forster ◽  
Martin Oestreich
Keyword(s):  
Bond Activation ◽  
Metal Ligand

Preparation of a Borane-Appended Co(III) Hydride: Evidence for Metal-Ligand Cooperativity in O—H Bond Activation

2021 ◽  
Author(s):  
Joseph A Zurakowski ◽  
Brady Austen ◽  
Maeve C Dufour ◽  
Moulika Bhattacharyya ◽  
Denis M Spasyuk ◽  
...  
Keyword(s):  
Hydrogen Atom ◽  
Bond Activation ◽  
Chemical Transformations ◽  
Important Chemical ◽  
Metal Ligand

Cobalt hydrides are known to mediate a number of important chemical transformations including proton (H+), hydride (H—), and hydrogen-atom (Hdot) transfer. Central to the tunability of such frameworks is judicious...

Cooperative bond activation reactions with carbene complexes

2018 ◽  
Vol 54 (50) ◽  
pp. 6540-6553 ◽  
Author(s):  
Kai-Stephan Feichtner ◽  
Viktoria H. Gessner
Keyword(s):  
Bond Activation ◽  
Carbene Complexes ◽  
Recent Advances ◽  
Metal Ligand

This review highlights the recent advances in the application of carbene complexes in bond activation reactions via metal–ligand cooperation.

scholarly journals Combining Metal-Metal Cooperativity, Metal-Ligand Cooperativity and Chemical Non-Innocence in Diiron Carbonyl Complexes

2021 ◽  
Author(s):  
Cody Bernard Beek ◽  
Nicolaas P. van Leest ◽  
Martin Lutz ◽  
Robertus J. M. Klein Gebbink ◽  
Bas de Bruin ◽  
...  
Keyword(s):  
Bond Activation ◽  
Binding Mode ◽  
Carbonyl Complexes ◽  
Bimetallic Systems ◽  
Metal Atoms ◽  
Metal Metal ◽  
Close Proximity ◽  
Catalytic Reactivity ◽  
Unstable Intermediate ◽  
Metal Ligand

Several metalloenzymes, including [FeFe]-hydrogenase, employ cofactors wherein multiple metal atoms work together with surrounding ligands that mediate heterolytic and concerted proton-electron transfer (CPET) bond activation steps. Herein, we report a new dinucleating PNNP expanded pincer ligand, which can bind two low-valent iron atoms in close proximity to enable metal-metal cooperativity (MMC). In addition, reversible partial dearomatization of the ligand’s naphthyridine core enables both heterolytic metal-ligand cooperativity (MLC) and chemical non-innocence through CPET steps. Thermochemical and computational studies show how a change in ligand binding mode can lower the bond dissociation free energy of ligand C(sp3)–H bonds by ~25 kcal mol-1. H-atom abstraction enabled trapping of an unstable intermediate, which undergoes facile loss of two carbonyl ligands to form an unusual paramagnetic (S = 1/2) complex containing a mixed-valent iron(0)-iron(I) core bound within a partially dearomatized PNNP ligand. Finally, cyclic voltammetry experiments showed that these diiron complexes show catalytic activity for the electrochemical hydrogen evolution reaction. This work presents the first example of a ligand system that enables MMC, heterolytic MLC and chemical non-innocence, thereby providing important insights and opportunities for the development of bimetallic systems that exploit these features to enable new (catalytic) reactivity.

Sign in / Sign up

Export Citation Format

Share Document