scholarly journals Low-coordinate first-row transition metal complexes in catalysis and small molecule activation

2019 ◽  
Vol 48 (33) ◽  
pp. 12365-12381 ◽  
Author(s):  
Laurence J. Taylor ◽  
Deborah L. Kays
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Small Molecules ◽  
Transition Metal Complexes ◽  
Small Molecule ◽  
High Reactivity ◽  
Small Molecule Activation ◽  
Coordination Numbers

In this Perspective, we will highlight selected examples of transition metal complexes with low coordination numbers whose high reactivity has been exploited in catalysis and the activation of small molecules featuring strong bonds (N2, CO2, and CO).

scholarly journals Ru(II)-Dppz Derivatives and Their Interactions with DNA: Thirty Years and Counting

2021 ◽  
Vol 11 (7) ◽  
pp. 3038
Author(s):  
Maria Letizia Di Pietro ◽  
Giuseppina La Ganga ◽  
Francesco Nastasi ◽  
Fausto Puntoriero
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Small Molecules ◽  
Transition Metal Complexes ◽  
Mechanism Of Action ◽  
Spectroscopic Techniques ◽  
Biological Applications ◽  
Ancillary Ligands ◽  
Structural Modifications ◽  
Over Time

Transition metal complexes with dppz-type ligands (dppz = dipyrido[3,2-a:2′,3′-c]phenazine) are extensively studied and attract a considerable amount of attention, becoming, from the very beginning and increasingly over time, a powerful tool for investigating the structure of the DNA helix. In particular, [Ru(bpy)2(dppz)]2+ and [Ru(phen)2(dppz)]2+ and their derivatives were extensively investigated as DNA light-switches. The purpose of this mini-review, which is not and could not be exhaustive, was to first introduce DNA and its importance at a biological level and research in the field of small molecules that are capable of interacting with it, in all its forms. A brief overview is given of the results obtained on the Ru-dppz complexes that bind to DNA. The mechanism of the light-switch active in this type of species is also briefly introduced along with its effects on structural modifications on both the dppz ligand and the ancillary ligands. Finally, a brief mention is made of biological applications and the developments obtained due to new spectroscopic techniques, both for understanding the mechanism of action and for cellular imaging applications.

Ultrafast Photochemistry of a Molybdenum Carbonyl-Nitrosyl Complex with a Triazacyclononane Coligand

2021 ◽  
Author(s):  
Niklas Gessner ◽  
Anna Karina Bäck ◽  
Johannes Knorr ◽  
Christoph Nagel ◽  
Philipp Marquetand ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Carbon Monoxide ◽  
Transition Metal ◽  
Metal Complexes ◽  
Small Molecules ◽  
Transition Metal Complexes ◽  
Nitrosyl Complex ◽  
Molybdenum Carbonyl

Transition metal complexes capable of releasing small molecules such as carbon monoxide and nitric oxide upon photoactivation are versatile tools in various fields of chemistry and biology. In this work,...

scholarly journals Coordination Behavior of [Cp″2Zr(µ1:1-As4)] towards Lewis Acids

Molecules ◽  
2021 ◽  
Vol 26 (10) ◽  
pp. 2966
Author(s):  
Veronika Heinl ◽  
Gábor Balázs ◽  
Sarah Koschabek ◽  
Maria Eckhardt ◽  
Martin Piesch ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Lewis Acid ◽  
Reaction Temperature ◽  
Lewis Acids ◽  
Computational Studies ◽  
Coordination Modes ◽  
Coordination Numbers ◽  
Coordination Behavior

The functionalization of the arsenic transfer reagent [Cp″2Zr(η1:1-As4)] (1) focuses on modifying its properties and enabling a broader scope of reactivity. The coordination behavior of 1 towards different Lewis-acidic transition metal complexes and main group compounds is investigated by experimental and computational studies. Depending on the steric requirements of the Lewis acids and the reaction temperature, a variety of new complexes with different coordination modes and coordination numbers could be synthesized. Depending on the Lewis acid (LA) used, a mono-substitution in [Cp″2Zr(µ,η1:1:1:1-As4)(LA)] (LA = Fe(CO)4 (4); B(C6F5)3 (7)) and [Cp″2Zr(µ,η3:1:1-As4)(Fe(CO)3)] (5) or a di-substitution [Cp″2Zr(µ3,η1:1:1:1-As4)(LA)2] (LA = W(CO)5 (2); CpMn(CO)2 (3); AlR3 (6, R = Me, Et, iBu)) are monitored. In contrast to other coordination products, 5 shows an η3 coordination in which the butterfly As4 ligand is rearranged to a cyclo-As4 ligand. The reported complexes are rationalized in terms of inverse coordination.

Activation of small molecules by transition-metal complexes

2019 ◽  
pp. 131-172 ◽  
Author(s):  
Madhavan Jaccob ◽  
Muniyandi Sankaralingam ◽  
Neethinathan Johnee Britto
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Small Molecules ◽  
Transition Metal Complexes
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