scholarly journals Tuning the Bonding of a μ-Mesityl Ligand on Dicopper(I) through a Proton-Responsive Expanded PNNP Pincer Ligand

Author(s):  
Errikos Kounalis ◽  
Martin Lutz ◽  
Daniël Broere

<p>We report the synthesis and characterization of a series of cationic, neutral and anionic dicopper(I) complexes featuring a <i>µ</i>-mesityl ligand and a naphthyridine-derived PNNP expanded pincer ligand. Structural characterization showed that the protonation state of the dinucleating ligand has a pronounced effect on the bending and tilting of the <i>µ</i>-mesityl ligand. DFT calculations indicate that the varying orientations of the <i>µ</i>-mesityl ligand are inherent due to changes in electronic structure rather than crystal packing effects. NBO analysis reveals how the interactions that contribute to the 3-center 2-electron bond between the <i>µ</i>-mesityl ligand and the dicopper core change for the various degrees of observed bending and tilting. </p>

2019 ◽  
Author(s):  
Errikos Kounalis ◽  
Martin Lutz ◽  
Daniël Broere

<p>We report the synthesis and characterization of a series of cationic, neutral and anionic dicopper(I) complexes featuring a <i>µ</i>-mesityl ligand and a naphthyridine-derived PNNP expanded pincer ligand. Structural characterization showed that the protonation state of the dinucleating ligand has a pronounced effect on the bending and tilting of the <i>µ</i>-mesityl ligand. DFT calculations indicate that the varying orientations of the <i>µ</i>-mesityl ligand are inherent due to changes in electronic structure rather than crystal packing effects. NBO analysis reveals how the interactions that contribute to the 3-center 2-electron bond between the <i>µ</i>-mesityl ligand and the dicopper core change for the various degrees of observed bending and tilting. </p>


2004 ◽  
Vol 6 (9) ◽  
pp. 1397-1400 ◽  
Author(s):  
Yasushi Morita ◽  
Shinsuke Nishida ◽  
Tadahiro Kobayashi ◽  
Kozo Fukui ◽  
Kazunobu Sato ◽  
...  

2021 ◽  
Author(s):  
Fabrizio Ortu ◽  
simon Randall ◽  
David J. Moulding ◽  
Adam woodward ◽  
Karsten Meyer ◽  
...  

We report the synthesis and characterization of a new family of pentavalent uranyl amide complexes, supported also by photoluminescence and theoretical investigations. These studies reveal for the first time that the UV-visible emission of uranyl(V) is an admixture of charge transfer transitions accompanied by vibronic coupling of the quartet excited state with uranyl oxo and amide vibrations, thereby offering new insights into the electronic structure of the reactive uranyl(V)


2017 ◽  
Vol 46 (12) ◽  
pp. 4075-4085 ◽  
Author(s):  
Nathalie Bridonneau ◽  
Luca Rigamonti ◽  
Giordano Poneti ◽  
Dawid Pinkowicz ◽  
Alessandra Forni ◽  
...  

High or low spin states in iron(ii) complexes with functionalised 2,6-bis(pyrazol-1-yl)pyridine ligands are efficaciously driven by intermolecular contacts.


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