scholarly journals Two heads are better than one: improving magnetic relaxation in the dysprosium metallocene upon dimerization by use of an exceptionally weakly-coordinating anion

2020 ◽  
Vol 56 (44) ◽  
pp. 5937-5940 ◽  
Author(s):  
Dylan Errulat ◽  
Bulat Gabidullin ◽  
Akseli Mansikkamäki ◽  
Muralee Murugesu
Keyword(s):  
Magnetic Relaxation ◽  
Relaxation Dynamics ◽  
Bridging Ligand ◽  
Weakly Coordinating Anions ◽  
Weakly Coordinating ◽  
Weakly Coordinating Anion ◽  
Better Than

Combining two weakly-coordinating anions in the archetypical metallocene results in the first example of [BPh4]− as a bridging ligand in 4f metals, resulting in improved magnetic relaxation dynamics over its mononuclear counterpart.

C–H Functionalization Reactions of Phenyl and Vinyl Carbocations Paired with Weakly Coordinating Anions

Synlett ◽  
2020 ◽  
Vol 31 (19) ◽  
pp. 1851-1856
Author(s):  
Hosea M. Nelson ◽  
Stasik Popov ◽  
Brian Shao ◽  
Alex L. Bagdasarian ◽  
Benjamin Wigman
Keyword(s):  
High Energy ◽  
Mechanistic Studies ◽  
Insertion Reactions ◽  
Weakly Coordinating Anions ◽  
Recent Developments ◽  
Weakly Coordinating ◽  
Weakly Coordinating Anion

Carbocations have played a central role in the chemical sciences for over a century. In a synthetic setting, most methods utilize stabilized tricoordinate carbocations, while there are far fewer examples of reactions featuring nonstabilized dicoordinate cations. Here, we provide an overview of recent developments in the generation of high-energy carbocations mediated by weakly coordinating anions and the C–H insertion reactions of such carbocations. Moreover, we discuss mechanistic studies of these catalytic C–H insertion reactions aimed at furthering our understanding of the reactive nature of these rarely invoked cationic intermediates.1 Introduction2 Background: Phenyl Carbocations3 Silylium/Carborane-Catalyzed C–H Insertion Reactions of Phenyl Carbocations4 Silane-Fueled, Weakly Coordinating Anion-Catalyzed, Reductive C–H Insertion Reactions of Vinyl Carbocations5 C–H Insertion Reactivity of Vinyl Carbocations under Basic Conditions6 Conclusion and Outlook

scholarly journals Synthetic, Spectroscopic, Structural, and Electrochemical Investigations of Ferricenium Derivatives with Weakly Coordinating Anions: Ion Pairing, Substituent, and Solvent Effects

2021 ◽  
Author(s):  
Firoz Shah Tuglak Khan ◽  
Amy L Waldbusser ◽  
Maria C. C. Carrasco ◽  
Hadi Pourhadi ◽  
Shabnam Hematian
Keyword(s):  
Solvent Effects ◽  
Ion Pairing ◽  
Effective Strategy ◽  
Weakly Coordinating Anions ◽  
Weakly Coordinating ◽  
Electron Withdrawing Substituents

A facile and effective strategy for the preparation of a series of ferricenium complexes bearing either electron-donating or electron-withdrawing substituents with weakly coordinating anions such as [B(C6F5)4]– or SbF6– is...

scholarly journals Super-electrophiles of Tri- and Tetra-Anions Stabilized by Selected Terminal Groups and Their Role in Binding Noble Gas atoms

2021 ◽  
Author(s):  
MingMin Zhong ◽  
Hong Fang ◽  
Deepika Deepika ◽  
Purusottam Jena
Keyword(s):  
Gas Phase ◽  
Noble Gas ◽  
Atomic Clusters ◽  
Weakly Coordinating Anions ◽  
Multiply Charged ◽  
Potential Applications ◽  
Weakly Coordinating

Stabilization of multiply-charged atomic clusters in the gas phase has been a topic of great interest not only because of their potential applications as weakly-coordinating anions, but also for their...

Mono(arene) Complexes of Thallium(I) Supported by a Weakly Coordinating Anion

2007 ◽  
Vol 26 (7) ◽  
pp. 1811-1815 ◽  
Author(s):  
Yann Sarazin ◽  
Nikolas Kaltsoyannis ◽  
Joseph A. Wright ◽  
Manfred Bochmann
Keyword(s):  
Arene Complexes ◽  
Weakly Coordinating ◽  
Weakly Coordinating Anion

Taming the Cationic Beast: Novel Developments in the Synthesis and Application of Weakly Coordinating Anions

2018 ◽  
Vol 57 (43) ◽  
pp. 13982-14024 ◽  
Author(s):  
Ian M. Riddlestone ◽  
Anne Kraft ◽  
Julia Schaefer ◽  
Ingo Krossing
Keyword(s):  
Weakly Coordinating Anions ◽  
Weakly Coordinating

Comparing Interactions of a Three-Coordinate Pd Cation with Common Weakly Coordinating Anions

2018 ◽  
Vol 37 (14) ◽  
pp. 2376-2385 ◽  
Author(s):  
Derek I. Wozniak ◽  
William A. Sabbers ◽  
Kushan C. Weerasiri ◽  
Luckym V. Dinh ◽  
Jacqueline L. Quenzer ◽  
...  
Keyword(s):  
Weakly Coordinating Anions ◽  
Weakly Coordinating

Magnetic relaxation dynamics in thermally arrested Cr-modified Mn 2 Sb

2018 ◽  
Vol 461 ◽  
pp. 62-68 ◽  
Author(s):  
Yoshifuru Mitsui ◽  
Yoshihiro Matsumoto ◽  
Yoshiya Uwatoko ◽  
Masahiko Hiroi ◽  
Keiichi Koyama
Keyword(s):  
Magnetic Relaxation ◽  
Relaxation Dynamics

Aluminum-Ion Electrolytes with Weakly Coordinating Anions

2021 ◽  
Vol MA2021-01 (6) ◽  
pp. 308-308
Author(s):  
Xiaoyu Wen ◽  
Juchen Guo
Keyword(s):  
Aluminum Ion ◽  
Weakly Coordinating Anions ◽  
Weakly Coordinating

Modulating the Relaxation Dynamics via Structural Transition From Dinuclear Dysprosium Cluster to Nonanuclear Cluster

2021 ◽  
Author(s):  
peng hu ◽  
Ling-hui Cao ◽  
Ao-gang Liu ◽  
Yi-Quan Zhang ◽  
Tianle Zhang ◽  
...  
Keyword(s):  
Energy Barrier ◽  
Magnetic Relaxation ◽  
Structural Transition ◽  
Relaxation Dynamics

Along with the transition from a dinuclear dysprosium cluster to a nonanuclear one, the variable magnetic relaxation with the energy barrier changing from 217.87 K to 9.24 K had been...

Synthesis and Crystal Structures of Silver Thianthrene Complexes with Weakly Coordinating Anions

2007 ◽  
Vol 62 (10) ◽  
pp. 1291-1297 ◽  
Author(s):  
Rachmat Triandi ◽  
Johannes Beck
Keyword(s):  
Sulfur Dioxide ◽  
Silver Complexes ◽  
Molecular Symmetry ◽  
Bridging Ligands ◽  
Liquid Sulfur ◽  
Structure Selection ◽  
Weakly Coordinating Anions ◽  
Secondary Bonds ◽  
Weakly Coordinating ◽  
Selection Of

Two novel silver complexes with thianthrene (TA) as a ligand have been synthesized in the poorly coordinating solvent liquid sulfur dioxide, using silver salts with weakly coordinating anions [BF4]− and [SbF6]−. Both colorless compounds contain discrete molecular entities and SO2 molecules included in the crystal structure. Selection of crystals and the diffraction data collection were performed at low temperatures (123 K). The tris(μ-thianthrene-κ2S)disilver(I) bis(hexafluoroantimonate) sulfur dioxide solvate [Ag2(TA)3][SbF6]2·5SO2 (1) (monoclinic, P21/c, a = 21.644(3), b = 12.4216(4), c = 21.934(3) Å , β = 115.04(1)°, Z = 4) is made up of complexes bearing three TA units acting as bridging ligands with both S atoms towards two Ag+ ions with d(Ag+-Ag+) = 2.911 Å giving the [Ag2(TA)3]2+ unit approximately D3h molecular symmetry. The bis(μ-thianthrene-κ2S)disilver(I) bis(tetrafluoroborate) sulfur dioxide solvate [Ag2(TA)2][BF4]2・3SO2 (2) (monoclinic, C2/c, a = 21.0045(6), b = 7.4553(2), c = 22.6024(6) A° , β = 109.65(0)°, Z = 4) is made up of [Ag2(TA)2]2+units with two bridging TA units coordinating two Ag+ ions with d(Ag+-Ag+) = 2.925 Å giving the complexes approximately D2h molecular symmetry. Weak, secondary bonds between Ag+ and the F atoms of the anions, such as Ag···F-SbF5 = 2.862(4) Å in 1 or Ag···F-BF3 = 2.773(2) Å in 2, and with O atoms of SO2 molecules link the complexes with the anions and the solvate molecules, respectively.

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