34 Hits in 4.8 sec

High Yield C-Derivatization of Weakly Coordinating Carborane Anions

Matthew J. Nava, Christopher A. Reed
2010 Inorganic Chemistry  
Unlike the "parent" carborane anion CHB 11 H 11 -, halogenated carborane anions such as CHB 11 H 5 Br 6 can be readily C-functionalized in high yield and purity, enhancing their utility as weakly coordinating  ...  B-halogenated icosahedral carborane anions such as CHB 11 -H 5 X 6 and CHB 11 X 11 -(X = halogen; Figure 1 ) are particularly useful members of a class of exceptionally inert, weakly coordinating anions  ...  chemistry. 8, 9 Despite these promising applications, the C-derivatization chemistry of carborane anions has progressed rather slowly.  ... 
doi:10.1021/ic100053u pmid:20450167 pmcid:PMC2883884 fatcat:2g6ezp4aczcfbayj5taifq4yty

Synthesis and Applications of Perfunctionalized Boron Clusters

Jonathan C. Axtell, Liban M. A. Saleh, Elaine A. Qian, Alex I. Wixtrom, Alexander M. Spokoyny
2018 Inorganic Chemistry  
showed that perchlorination of closo-[B 12 H 12 ] 2− may be achieved using SO 2 Cl 2 as a chlorinating agent, leading to a more operationally simple synthesis. 65 Perfluorination of closo-[B 12 H 12 ]  ...  Homoperfunctionalized B 12 Clusters Halogenation-The first reported perfunctionalization of closo-[B 12 H 12 ] 2− involved direct perhalogenation with elemental chlorine, bromine and iodine, resulting  ...  Applications as Weakly Coordinating Ions Catalysis-Ozerov and co-workers have leveraged the weakly coordinating nature of closo-[B 12 X 12 ] 2− dianions in the catalytic hydrodefluorination (HDF) of sp  ... 
doi:10.1021/acs.inorgchem.7b02912 pmid:29465227 pmcid:PMC5985200 fatcat:vpc4slup6rfu3fir3nwf77lu4i

Carboranes as guests, counterions and linkers in coordination polymers and networks

Catherine E. Housecroft
2015 Journal of Organometallic Chemistry  
In this review, comments on coordination polymers in which neutral carborane guests are accommodated are followed by discussion of the incorporation of anionic carboranes into coordination polymers and  ...  Abstract Carborane clusters play a variety of roles in the assembly of 1D-coordination polymers and 2D-and 3D-networks.  ...  Carborane anions: weakly coordinating or coordinatively innocent?  ... 
doi:10.1016/j.jorganchem.2015.04.047 fatcat:6cgpkdmw3bfxffecmcdbgfrnpm

Metal Hydroborates: From Hydrogen Stores to Solid Electrolyte

Radovan Černý, Fabrizio Murgia, Matteo Brighi
2021 Journal of Alloys and Compounds  
It is shown that from the most promising application in hydrogen storage due to their high gravimetric and volumetric capacities, the focus has moved to solid electrolytes due to high cation mobility in  ...  This makes the closo-borates, especially the sodium dodecahedral ones, very promising candidates for SE.  ...  Inorganic hydroborates were studied as fuels for military applications [6] , reducing agents in organic syntheses [7] , weakly coordinating anions in catalysis [8, 9] , for the delivery of 10 B for  ... 
doi:10.1016/j.jallcom.2021.162659 fatcat:mz3nl2f7urhrjk6tx65jrbauqe

Carboranes in the chemist's toolbox

Russell N. Grimes
2015 Dalton Transactions  
A carborane-fullerene dyad for organic field-effect transistors illustrates one of the many diverse areas of technology in which the special properties of these polyhedral boron clusters are being exploited  ...  Carboranes in Metal-Organic Frameworks Coordination polymers with high porosity, which are of considerable interest in several applications including catalysis, gas separation and storage, and ion exchange  ...  9 , closo-CB 11 , or Co(C 2 B 9 H 11 ) 2 units in one-dimensional coordination networks held together by Ag−H−B and Ag−I−B interactions. 143 Another variety, obtained when an excess of dabco was used  ... 
doi:10.1039/c5dt00231a pmid:25710453 fatcat:evnyuzswt5gq7gkhkxpk3b2dna

Solvation, Rational Design, and Interfaces: Development of Divalent Electrolytes

Noel J. Leon, Mingfu He, Chen Liao
2022 Frontiers in Energy Research  
Rechargeable multivalent ion batteries are promising tools to complement current lithium-ion batteries for a future of diverse energy storage needs.  ...  Piecing together compatible cathode and electrolytes for a complete practical multivalent ion battery lacks a cohesive method for further development and refinement.  ...  Weakly Coordinating Anion Electrolytes Weakly coordinating anions (WCA) are employed for their ability to delocalize a negative charge over an entire robust structure, thus mitigating ion-pairing.  ... 
doi:10.3389/fenrg.2021.802398 fatcat:rrqzpg52obgxnnghab3zgx2hge

The medicinal chemistry of carboranes

John F Valliant, Katharina J Guenther, Arienne S King, Pierre Morel, Paul Schaffer, Oyebola O Sogbein, Karin A Stephenson
2002 Coordination chemistry reviews  
(1-) ions.  ...  . / Coordination Chemistry Reviews 232 (2002) 173 Á/230  ... 
doi:10.1016/s0010-8545(02)00087-5 fatcat:cfjjnj535bb73hfr2drjelorlm

Anions for Near-Infrared Selective Organic Salt Photovoltaics

Christopher J. Traverse, Margaret Young, John Suddard-Bangsund, Tyler Patrick, Matthew Bates, Pei Chen, Brian Wingate, Sophia Y. Lunt, Annick Anctil, Richard R. Lunt
2017 Scientific Reports  
In this work, we demonstrate novel phenyl borate and carborane-based anions paired with a near-infrared (NIR)-selective heptamethine cation.  ...  Carboranes are highly stable carbon-boron molecular clusters that have emerged recently for use as superacids 8,9 and have been shown to serve as extremely low coordinating anions for use in organic salts  ...  Dan Jones for access to the mass spectrometry facilities, and Adam Redoute for asssitance with carborane device preparation. Supporting Information is available online.  ... 
doi:10.1038/s41598-017-16539-3 pmid:29180694 pmcid:PMC5703893 fatcat:nqkxwaegxnespghcc4qvs4zuyq

Boron: Its role in energy related research and applications

Zhenguo Huang, Suning Wang, Rian D. Dewhurst, Nikolai V. Ignat'ev, Maik Finze, Holger Braunschweig
2019 Angewandte Chemie International Edition  
coordinating anions.  ...  achieve a full octet of electrons with four covalent bonds and a negative charge has led to the synthesis of a wide variety of borate anions of high chemical and electrochemical stability-in particular, weakly  ...  promising results.The salt [Mg 2 C l3 (thf) 6 ] + [Mg(closo-1,7-C 2 B 10 H 11 ) 2 Cl(thf)] À was crystallized from as olution of this electrolyte ( Figure 9 ) and thus provided evidence for the coordination  ... 
doi:10.1002/anie.201911108 pmid:31625661 fatcat:vhh2jpyqyzgytjodpdyfjratx4

From nonpeptide toward noncarbon protease inhibitors: Metallacarboranes as specific and potent inhibitors of HIV protease

P. Cigler, M. Ko i ek, P. eza ova, J. Brynda, Z. Otwinowski, J. Pokorna, J. Ple ek, B. Gruner, L. Dole kova-Mare ova, M. Ma a, J. Sedla ek, J. Bodem (+3 others)
2005 Proceedings of the National Academy of Sciences of the United States of America  
hydrogen butylimino bis-8,8-[5-(3-oxa-pentoxy)-3-cobalt bis(1,2dicarbollide)]di-ate, exhibited a Ki value of 2.2 nM and a submicromolar EC50 in antiviral tests, showed no toxicity in tissue culture, weakly  ...  The structure of the parent cobalt bis(1,2-dicarbollide) in complex with HIV PR was determined at 2.15 Å resolution by protein crystallography and represents the first carborane-protein complex structure  ...  When screening a number of structural motifs, we identified a group of inorganic compounds, icosahedral boranes, carboranes, and namely 12-vertex metal bis(dicarbollides), as promising frameworks for a  ... 
doi:10.1073/pnas.0507577102 pmid:16227435 pmcid:PMC1255736 fatcat:getfsxgqwfa6hhfwpuq5xpocgq

Silver(I) and Copper(I) Complexation with Decachloro-Closo-Decaborate Anion

Varvara V. Avdeeva, Grigoriy A. Buzanov, Elena A. Malinina, Nikolay T. Kuznetsov, Anna V. Vologzhanina
2020 Crystals  
A series of complexation reactions of silver(I) and copper(I) in the presence of a polyhedral weakly coordinating [B10Cl10]2− anion has been carried out.  ...  coordinated by the metal atom.  ...  In crystallography, polyhedral boranes and carboranes and their halogen derivatives are considered weakly coordinating anions [19] [20] [21] [22] , and X-ray diffraction data allow metal atoms and various  ... 
doi:10.3390/cryst10050389 fatcat:3lpjr3i4yvcs3i5aknrkivgoii

The State of the Art in Boron Polymer Chemistry [chapter]

Manoj K. Kolel-Veetil, Teddy M. Keller
2006 Macromolecules Containing Metal and Metal-Like Elements  
A polymer-supported metallocene catalyst (51) with a weakly coordinating anion, [B(C 6 F 5 ) 4 ] Ϫ , produced from lightly cross-linked, chloromethylated polystyrene beads for olefin polymerization.  ...  The stability was due to the steric hindrance of the bulky tripyl groups preventing oxygen attack of the borons. 28 In the area of ion sensing, cation recognition by electrodes containing functionalized  ...  Hardie et al. have utilized the coordination strategy for constructing coordination polymers by mixing silver carborane salts Ag(CB 11 H 12 ) (165) or Ag[Co(C 2 B 9 H 11 ) 2 ]  ... 
doi:10.1002/9780470139653.ch1 fatcat:r4umfkkg7nb7dngpyfcsruyati

Spin Crossover in New Iron(II) Coordination Compounds with Tris(pyrazol-1-yl)Methane

Olga G. Shakirova, Ludmila G. Lavrenova
2020 Crystals  
We review here new advances in the synthesis and investigation of iron(II) coordination compounds with tris(pyrazol-1-yl)methane and its derivatives as ligands.  ...  The given series shows that with an increase in sizes of both closo-borate and carborane (due to the introduction of the substituent) Tc increases.  ...  and carborane (due to the introduction of the substituent) T c increases.  ... 
doi:10.3390/cryst10090843 fatcat:oxlw3yqaejgvvfmrw5n3sufcwq

Monocarborane cluster as a stable fluorine-free calcium battery electrolyte

Kazuaki Kisu, Sangryun Kim, Takara Shinohara, Kun Zhao, Andreas Züttel, Shin-ichi Orimo
2021 Scientific Reports  
The developed electrolyte is a promising candidate for use in room-temperature rechargeable Ca batteries.  ...  AbstractHigh-energy-density and low-cost calcium (Ca) batteries have been proposed as 'beyond-Li-ion' electrochemical energy storage devices.  ...  The [B(hfip) 4 ] anion is known to be a weakly coordinating anion with weak anion-cation interactions, thereby favouring ion association and higher conductivities 15, 16 .  ... 
doi:10.1038/s41598-021-86938-0 pmid:33824357 fatcat:g5br7tw3ebeu7frchpkde3zu5m

Reactive p-block cations stabilized by weakly coordinating anions

Tobias A. Engesser, Martin R. Lichtenthaler, Mario Schleep, Ingo Krossing
2016 Chemical Society Reviews  
WCAs The search for larger and more weakly coordinating anions 15 1998 WCAs Carboranes: a new class of weakly coordinating anions for strong electrophiles, oxidants, and superacids 16 2004 WCAs Noncoordinating  ...  All of them have more or less weakly coordinating anions as counter ions.  ... 
doi:10.1039/c5cs00672d pmid:26612538 pmcid:PMC4758321 fatcat:it7eru5wjzgajhbcmeodztegva
« Previous Showing results 1 — 15 out of 34 results