Search Results - "Prakash, GKSurya"

Taming of Fluoroform: Direct Nucleophilic Trifluoromethylation of Si, B, S, and C Centers by Prakash, G. K. Surya, Jog, Parag V., Batamack, Patrice T. D., Olah, George A.

“…Fluoroform (CF 3 H), a large-volume by-product of the manufacture of Teflon, refrigerants, polyvinylidene fluoride (PVDF), fire-extinguishing agents, and…”
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Long-Lived Trifluoromethanide Anion: A Key Intermediate in Nucleophilic Trifluoromethylations by Prakash, G. K. Surya, Wang, Fang, Zhang, Zhe, Haiges, Ralf, Rahm, Martin, Christe, Karl O., Mathew, Thomas, Olah, George A.

“…The trifluoromethanide anion is the postulated key intermediate in nucleophilic trifluoromethylation reactions. However, for more than six decades, the…”
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Easily Regenerable Solid Adsorbents Based on Polyamines for Carbon Dioxide Capture from the Air by Goeppert, Alain, Zhang, Hang, Czaun, Miklos, May, Robert B., Prakash, G. K. Surya, Olah, George A., Narayanan, S. R.

“…Adsorbents prepared easily by impregnation of fumed silica with polyethylenimine (PEI) are promising candidates for the capture of CO2 directly from the air…”
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Gallium(III) Triflate: An Efficient and a Sustainable Lewis Acid Catalyst for Organic Synthetic Transformations by Prakash, G. K. Surya, Mathew, Thomas, Olah, George A

“…Green chemical processes play a crucial role in sustainable development, and efficient recyclable catalysts that can be conveniently applied in various…”
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Ab Initio/GIAO-CCSD(T) Calculated super(13)C- super(11) B NMR Chemical Shift Relationships in Isoelectronic Hypercoordinate Carbonium and Boronium As Well As Carbenium and Borenium Ions by Rasul, Golam, Prakash, GKSurya, Olah, George A

“…Good linear correlations between GIAO-CCSD(T) calculated super(11)B NMR chemical shifts of hypercoordinate boronium 1-6b and borenium 7-9b ions and super(13)C…”
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N,N-Dimethyl- S-difluoromethyl- S-phenylsulfoximinium tetrafluoroborate: A versatile electrophilic difluoromethylating reagent by Prakash, G.K. Surya, Zhang, Zhe, Wang, Fang, Ni, Chuanfa, Olah, George A.

“…[Display omitted] ► N, N-Dimethyl- S-difluoromethyl- S-phenylsulfoximinium tetrafluoroborate is prepared. ► The reagent is able to difluoromethylate a series…”
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C sub(7)H sub(12) super(2+): A Prototype Hexacoordinate Carbonium Ion by Rasul, Golam, Olah, George A, Prakash, GKSurya

“…C sub(7)H sub(12) super(2+) (1), the prototype hexacoordinate carbonium dication was found to be a viable minimum at the MP2/6-31G** and MP2/cc-pVTZ levels…”
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Electrochemical reduction of CO2 over Sn-NafionARG coated electrode for a fuel-cell-like device by Prakash, GKSurya, Viva, Federico A, Olah, George A

“…Commercially available Sn particles mixed with NafionARG ionomer are used to prepare an electrode with a gas diffusion layer support in a manner similar to…”
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Study of operating conditions and cell design on the performance of alkaline anion exchange membrane based direct methanol fuel cells by Prakash, G.K. Surya, Krause, Frederick C., Viva, Federico A., Narayanan, S.R., Olah, George A.

“…► MEAs with Tokuyama membrane for alkaline DMFCs evaluated. ► Alkaline DMFCs can reach performance similar to Nafion DMFCs. ► Anode wettability is very…”
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Stereoselective Synthesis of Fluoroalkenoates and Fluorinated Isoxazolidinones: N-Substituents Governing the Dual Reactivity of Nitrones by Prakash, G. K. Surya, Zhang, Zhe, Wang, Fang, Rahm, Martin, Ni, Chuanfa, Iuliucci, Marc, Haiges, Ralf, Olah, George A.

“…α‐Fluoroalkenoates and 4‐fluoro‐5‐isoxazolidinones are of vast interest due to their potential biological applications. We now demonstrate the syntheses of…”
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Silica Nanoparticles as Supports for Regenerable CO sub(2) Sorbents by Meth, Sergio, Goeppert, Alain, Prakash, GKSurya, Olah, George A

“…This paper describes the capture of CO sub(2) by polyethylenimine (PEI) physically adsorbed on the surface of silica nanoparticles. The resulting material…”
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Diazo Strategy for the Synthesis of Pyridazines: Pivotal Impact of the Configuration of the Diazo Precursor on the Process by Nikolaev, Valerij A., Cantillo, David, Kappe, C. Oliver, Medvedev, Jury J., Prakash, G. K. Surya, Supurgibekov, Murat B.

“…Phosphazenes of vinyldiazocarbonyl compounds having cis stereochemistry of the functional groups on the vinyl bond readily produce pyridazines by a…”
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Electrochemical CO sub(2) Reduction: Recent Advances and Current Trends by Jones, John-Paul, Prakash, GKSurya, Olah, George A

“…With rising levels of CO sub(2) in our atmosphere, technologies capable of converting CO sub(2) into useful products have become more valuable. The field of…”
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Synthesis and Characterization of Fluorodinitroamine, FN(NO sub(2)) sub(2) by Christe, Karl O, Wilson, William W, Belanger-Chabot, Guillaume, Haiges, Ralf, Boatz, Jerry A, Rahm, Martin, Prakash, GKSurya, Saal, Thomas, Hopfinger, Mathias

“…NF sub(3) and N(NO sub(2)) sub(3) are known compounds, whereas the mixed fluoronitroamines, FN(NO sub(2)) sub(2) and F sub(2)NNO sub(2), have been unknown thus…”
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ipso-Nitrosation of arylboronic acids with chlorotrimethylsilane and sodium nitrite by Prakash, G.K. Surya, Gurung, Laxman, Schmid, Philipp Christoph, Wang, Fang, Thomas, Tisa Elizabeth, Panja, Chiradeep, Mathew, Thomas, Olah, George A.

“…Nitroso compounds are versatile reagents in synthetic organic chemistry. Herein, we disclose a feasible protocol for the ipso-nitrosation of aryl boronic acids…”
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Difluoro(sulfinato)methylation of N-Sulfinyl Imines Facilitated by 2-Pyridyl Sulfone: Stereoselective Synthesis of Difluorinated [beta]-Amino Sulfonic Acids and Peptidosulfonamides by Prakash, G K Surya, Ni, Chuanfa, Wang, Fang, Zhang, Zhe, Haiges, Ralf, Olah, George A

“…Making chains: An efficient method has been developed for the synthesis of previously unknown enantiopure difluorinated [beta]-amino sulfinic and sulfonic…”
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Direct Synthesis of Diverse [beta]-Fluoroethylamines by a Multicomponent Protocol by Prakash, G. K. Surya, Gurung, Laxman, Jog, Parag V, Tanaka, Shinji, Thomas, Tisa Elizabeth, Ganesh, Nimisha, Haiges, Ralf, Mathew, Thomas, Olah, George A

“…No imines! A direct multicomponent protocol for the synthesis of highly diverse derivatives of β-fluoro(phenylsulfonyl)ethylamine has been developed by use of…”
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Lewis Acid Catalyzed Condensation-Cyclization Cascade: Direct Synthesis of Di/Trifluoromethyl-1,2,3,4-tetrahydroquinazolines by Prakash, G. K. Surya, Papp, Attila, Munoz, Socrates B., May, Nathan, Jones, John-Paul, Haiges, Ralf, Esteves, Pierre Mothé, Mathew, Thomas

“…Condensed heterocycles such as quinazolines constitute the framework of many promising drugs. The great impact of the dramatic fluorine effect in…”
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Synthesis of monofluoroalkenes via Julia–Kocienski reaction by Prakash, G.K. Surya, Shakhmin, Anton, Zibinsky, Mikhail, Ledneczki, Istvan, Chacko, Sujith, Olah, George A.

“…Monofluoromethyl 3,5-bis(trifluoromethyl)phenyl sulfone 1 was synthesized and employed in Julia–Kocienski fluoroolefination reaction with various ketones and…”
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Materials challenges and technical approaches for realizing inexpensive and robust ironaair batteries for large-scale energy storage by Narayanan, SR, Prakash, GKSurya, Manohar, A, Yang, Bo, Malkhandi, S, Kindler, Andrew

“…A high performance ironaair rechargeable battery has the potential of meeting the requirements of grid-scale energy storage. When successfully demonstrated,…”
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