Journal ArticleDOI
Electronic influence of ferrocenyl as a substituent
TLDR
In this paper, the dissociation constants of p-, m-, and o-ferrocenylbenzoic acids, ferrocenecarboxylic acid, and p-ferricenylphenol were determined.Abstract:
1.
The dissociation constants of p-, m-, and o-ferrocenylbenzoic acids, ferrocenecarboxylic acid, and p-ferrocenylphenol were determined, along with the basicity constants of p-, m-, and o-ferrocenylanilines and ferrocenylamine.
2.
The values of the σ constants for ferrocenyl as a substituent in the phenyl ring were calculated.
3.
The nature of certain electronic effects of ferrocenyl as a substituent was studied. Ferrocenyl exhibits a strong positive inductive effect and a weak positive conjugation effect.read more
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Patent
Method for preparing transition metal complexes, transition metal complexes prepared using the method, catalyst composition containing the complexes
TL;DR: In this paper, a transition metal complex with an amido group is presented, and a method for synthesizing the complex and olefin polymerization using the same is described.
Journal ArticleDOI
Synthesis, structure, and physical properties of new rare earth ferrocenoylacetonates
Pavel S. Koroteev,Zhanna V. Dobrokhotova,Andrey B. Ilyukhin,Nikolay N. Efimov,Mathieu Rouzières,Mikhail A. Kiskin,Rodolphe Clérac,Vladimir M. Novotortsev +7 more
TL;DR: New ferrocenoylacetonate complexes of several rare earth elements, [Ln(fca)3(bpy)]·MeC6H5, display single-molecule magnet properties, and the effective relaxation barrier for the Dy complex, was found to be Δeff/kB = 241 K, which is one of the highest values obtained for a mononuclear β-diketonate lanthanide complex.
Journal ArticleDOI
Synthesis of 2-ferrocenylidene-4-cyclopentene-1,3-diones
TL;DR: A squarate-based synthesis of 2-ferrocenylidene-4-cyclopentene-1,3-diones was described in this paper, where the major or exclusive formation was attributed to the radical-stabilizing ability of the ferroenyl group.
Journal ArticleDOI
Magnetic Behavior of Carboxylate and β-Diketonate Lanthanide Complexes Containing Stable Organometallic Moieties in the Core-Forming Ligand
Nikolay N. Efimov,Pavel S. Koroteev,Andrey V. Gavrikov,Andrey B. Ilyukhin,Zhanna V. Dobrokhotova,Vladimir M. Novotortsev +5 more
Abstract: Information concerning the structures of compounds of rare earth elements with carboxylic acids and a β-diketone containing stable organometallic moieties that we obtained previously is presented. Additional results for 15 complexes with the [Gd2O2] core allowed confirming and improving the correlation between JGd–Gd′ and the Gd…Gd distance for complexes of this type that we found earlier. For the first time, dc and ac magnetic measurements were carried out for the formerly-described complex [Dy2(O2CCym)4(NO3)2(DMSO)4] (2), Cym = (η5-C5H4)Mn(CO)3), and two new binuclear complexes, namely [Dy2(O2CFc)4(NO3)2(DMSO)4] (3), and [Dy2(O2CFc)6(DMSO)2(H2O)2] (4), Fc = (η5-C5H4)Fe(η5-C5H5)). For binuclear [Dy2(O2CCym)6(DMSO)4] (1), as well as for a 1D-polymer [Dy(O2CCym)(acac)2(H2O)]n (6), ac magnetic measurements were carried out more precisely. The characteristics of a single-molecule magnet and of a single-chain magnet were determined for Complexes 2 and 6, respectively.
Journal ArticleDOI
Tetranuclear Cr-Ln ferrocenecarboxylate complexes with a defect-dicubane structure: synthesis, magnetism, and thermolysis.
Pavel S. Koroteev,Zhanna V. Dobrokhotova,Andrey B. Ilyukhin,Ekaterina V. Belova,Ekaterina V. Belova,Alexey D. Yapryntsev,Mathieu Rouzières,Rodolphe Clérac,Nikolay N. Efimov +8 more
TL;DR: In this paper, the isostructural heterotrimetallic complexes [LnIII2CrIII2(OH)2(FcCO2)4(NO3) 2(Htea)2]·2MePh·2THF (Ln = Tb (1), Dy (2), Ho (3), Er (4), and Y (5); Fc = (η5-C5H4)
References
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Journal ArticleDOI
An Extended Table of Hammett Substitutent Constants Based on the Ionization of Substituted Benzoic Acids
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