scholarly journals Constructing [CoII6] hexagon-centered heterometallic {Ln6Co6} (Ln = Y, Eu and Dy) clusters with a calix[8]arene ligand

2020 ◽  
Vol 7 (21) ◽  
pp. 4070-4076
Author(s):  
Haitao Han ◽  
You-Song Ding ◽  
Xiaofei Zhu ◽  
Tian Han ◽  
Yan-Zhen Zheng ◽  
...  
Keyword(s):  
Arene Ligand ◽  
Polynuclear Clusters

Three isostructural 3d–4f polynuclear clusters {(LnIII6CoII6)(C8A)3} (Ln = Y, Eu, Dy; C8A = p-tert-butylcalix[8]arene) feature some tripod-like entities in which three Ln2-C8A SBUs bolster a [Co6] hexagon.

Mechanistische Untersuchungen zum reversiblen Gleichgewicht von metallorganischen Tripeldecker- und Sandwichkomplexen des Typs [Bis{(η5-CpR)Co}-μ-{η4:η4-aren}] und [(η5-CpR)Co(η6-aren)] / Mechanistic Studies towards the Reversible Equilibrium between Metal Organic Triple Decker and Sandwich Complexes [Bis{(η5 -CpR)Co}-μ-{η4 :η4-arene}] and [{(η5-CpR)Co(η6-arene)]

1998 ◽  
Vol 53 (11) ◽  
pp. 1267-1272 ◽  
Author(s):  
Jörg J. Schneider ◽  
Dirk Wolf
Keyword(s):  
Ligand Exchange ◽  
Sandwich Complexes ◽  
Valuable Metal ◽  
H Nmr ◽  
Synthetic Utility ◽  
Metal Organic ◽  
Arene Ligand ◽  
Benzene Toluene

The arene ligand exchange mechanism of slipped arene triple deckers [Bis{(η5-CpR)Co}-μ-{η4:η4-arene}] (R = Me5, 1,2,4 tri-tert butyl, arene = benzene, toluene) 1 was studied by 1H-NMR spectroscopy for different concentrations and solvents. It has been found that triple deckers of type 1 decompose slowly in solution. A unique equilibrium, between these triple deckers and the mixed sandwich complexes [(η6-arene)Co(η5-CpR)] and 14 e [(η5-Cp)Co]solv fragments generated in situ by decomposition o f 1 exists. In addition to this equilibrium arene lability of the thus formed mixed sandwich complex type has been detected by NMR making slipped triple deckers 1 ideal single source compounds for the generation of two [(η5-Cp)Co] fragments in one reaction step. Such fragments are valuable metal ligand components with high synthetic utility in organometallic chemistry.

Volatile Organic Compound Sensing by Gold Nanoparticles Capped with Calix[4]arene Ligand

2011 ◽  
Vol 40 (12) ◽  
pp. 1402-1404 ◽  
Author(s):  
Mutsumi Kimura ◽  
Mei Yokokawa ◽  
Seiko Sato ◽  
Tadashi Fukawa ◽  
Takashi Mihara
Keyword(s):  
Gold Nanoparticles ◽  
Organic Compound ◽  
Volatile Organic Compound ◽  
Volatile Organic ◽  
Arene Ligand

scholarly journals Fine Tuning of Cholinesterase and Glutathione-S-Transferase Activities by Organoruthenium(II) Complexes

Biomedicines ◽  
2021 ◽  
Vol 9 (9) ◽  
pp. 1243
Author(s):  
Tomaž Trobec ◽  
Kristina Sepčić ◽  
Monika Cecilija Žužek ◽  
Jerneja Kladnik ◽  
Nina Podjed ◽  
...  
Keyword(s):  
Neurodegenerative Disorder ◽  
Fine Tuning ◽  
Structural Elements ◽  
Carbonyl Complexes ◽  
Glutathione S Transferase ◽  
Preclinical Testing ◽  
Important Group ◽  
Glutathione S Transferases ◽  
Arene Ligand ◽  
Inhibitory Activities

Cholinesterases (ChEs) show increased activities in patients with Alzheimer’s disease, and remain one of the main therapeutic targets for treatment of this neurodegenerative disorder. A library of organoruthenium(II) complexes was prepared to investigate the influence of their structural elements on inhibition of ChEs, and on another pharmacologically important group of enzymes, glutathione S-transferases (GSTs). Two groups of organoruthenium(II) compounds were considered: (i) organoruthenium(II) complexes with p-cymene as an arene ligand, and (ii) organoruthenium(II) carbonyl complexes as CO-releasing molecules. Eight organoruthenium complexes were screened for inhibitory activities against ChEs and GSTs of human and animal origins. Some compounds inhibited all of these enzymes at low micromolar concentrations, while others selectively inhibited either ChEs or GSTs. This study demonstrates the importance of the different structural elements of organoruthenium complexes for their inhibitory activities against ChEs and GSTs, and also proposes some interesting compounds for further preclinical testing as ChE or GST inhibitory drugs.

Arene-Ligand-Free Ruthenium(II/III) Manifold for meta -C−H Alkylation: Remote Purine Diversification

2018 ◽  
Vol 24 (16) ◽  
pp. 3984-3988 ◽  
Author(s):  
Fernando Fumagalli ◽  
Svenja Warratz ◽  
Shou-Kun Zhang ◽  
Torben Rogge ◽  
Cuiju Zhu ◽  
...  
Keyword(s):  
Ligand Free ◽  
Arene Ligand

Notizen: Photochemische Verdrängung eines an Eisen(0) koordinierten Aromaten durch ein Dien / Photochemical Replacement of an Aromatic Ligand by a Diene in an Iron(0) Complex

1975 ◽  
Vol 30 (3-4) ◽  
pp. 291 ◽  
Author(s):  
Ingrid Fischler ◽  
Ernst A. Koerner
Keyword(s):  
Aromatic Ligand ◽  
Arene Ligand

The photoreaction of [(η-phenyl)phenylethylphosphane] (η -2,3-dimethylbutadiene)-iron(0) with 2,3-dimethylbutadiene results in replacement of the arene ligand by the diene, leading to a bis(diene)phosphane iron(0) complex.

A metal–metal bond passing through the arene ligand: a theoretical study on inverse sandwiches X[Sc–C8H8–Sc]nX (X = F, Cl, Br; n = 1, 2)

2015 ◽  
Vol 39 (3) ◽  
pp. 1558-1562 ◽  
Author(s):  
Nan-nan Liu ◽  
Yi-hong Ding
Keyword(s):  
Theoretical Study ◽  
Metal Bond ◽  
Metal Metal ◽  
Arene Ligand ◽  
Bond Chain

In X[Sc–C8H8–Sc]2X (X = F–Br), Sc–Sc bonds between two [Sc–C8H8–Sc] units and the Sc–Sc bond through C8H8 form the uninterrupted Sc–Sc–Sc–Sc bond-chain.

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