Search results for "Lithium"
showing 10 items of 680 documents
A Bidirectional Converter for the Integration of LiFePO4 Batteries with RES-based Generators Part I: Revising and Finalizing Design
2014
This paper presents a device for controlling and connecting combined Renewable Energy Sources (RES)-based generators and electric storage systems to the supply utility grid. The device is a bidirectional converter that can be controlled in order to facilitate the interface between the low voltage grid and small generators combined with lithium-ion LiFePO4 batteries, contemporary addressing the requirements of the reference technical standards for users connection and providing different ancillary services. The paper describes the revising and finalizing activities carried out by the DEIM of the University of Palermo and ENEA during 2013.
Free and bound hydroxyl and carboxyl groups in the cutin of Quercus suber leaves
1984
Abstract The number of free and bound hydroxyl and carboxyl groups of the cutin of Quercus suber leaves was investigated by the lithium borohydride hydrogenolysis of mesyl-cutin compared with the lithium borohydride hydrogenolysis of untreated cutin. Fifty per cent of the vic -diol groups of the trihydroxy C 18 acid component and twenty five per cent of the secondary hydroxyl groups of the dihydroxy C 16 acid component are free. The rest of the secondary and all of the primary hydroxyl groups are esterified; all carboxyl groups are esterified.
CCDC 1035257: Experimental Crystal Structure Determination
2015
Related Article: Christoph Förster and Katja Heinze|2015|Z.Anorg.Allg.Chem.|641|517|doi:10.1002/zaac.201400548
CCDC 711624: Experimental Crystal Structure Determination
2011
Related Article: J.Bares, V.Sourek, Z.Padelkova, P.Meunier, N.Pirio, I.Cisarova, A.Ruzicka, J.Holecek|2010|Collect.Czech.Chem.Commun.|75|121|doi:10.1135/cccc2009093
CCDC 195747: Experimental Crystal Structure Determination
2003
Related Article: A.T.Trifonov, T.P.Spaniol, J.Okuda|2003|Eur.J.Inorg.Chem.||926|doi:10.1002/ejic.200390122
CCDC 669577: Experimental Crystal Structure Determination
2008
Related Article: D.Cangussu, E.Pardo, M.-C.Dul, R.Lescouezec, P.Herson, Y.Journaux, E.F.Pedroso, C.L.M.Pereira, H.O.Stumpf, M.C.Munoz, R.Ruiz-Garcia, J.Cano, M.Julve, F.Lloret|2008|Inorg.Chim.Acta|361|3394|doi:10.1016/j.ica.2008.02.042
First Highly Diastereoselective Synthesis of syn α-Methyl β-Fluoroalkyl β-Amino Esters
1999
A new two-step approach for the diastereoselective synthesis of the syn α-methyl β-fluoroalkyl β-amino esters 4 has been developed. This approach is based on the chemical reduction of the fluorinated β-enamino esters 3, which have been previously obtained from imidoyl chlorides 1 and lithium ester enolates, with ZnI2/NaBH4 as the reducing agent. The process takes place with high syn diastereoselectivity and good to excellent yields. A metal-chelated six-membered model has been suggested to explain the stereochemical outcome of the reduction reaction.
Dienediolates of Unsaturated Carboxylic Acids in Synthesis. Tandem Michael Diechmann Synthesis of Substituted 2-Cyclohexenones
1991
Abstract 3,5-Disubstituted 2-Cyclohexenones are prepared by tandem Michael-Dieckmann addition of lithium dienediolates of dimethylacrylic and β-methylcinnamic acids to lithium carboxylates of unsaturated carboxylic acids.
Preparation and Application of Iron-substituted (Z)-Enals: Synthesis of 5-Substituted α,β-Butenolides
2000
Reactivity of lithium β‑ketocarboxylates: the role of lithium salts
2017
Lithium beta-ketocarboxylates 1(COOLi), prepared by the reaction of lithium enolates 2(Li+) with carbon dioxide, readily decarboxylate in THF solution unless in the presence of lithium salts, in which case they are indefinitely stable at room temperature in inert atmosphere. The availability of stable THF solutions of lithium beta-ketocarboxylates 1(COOLi) in the absence of carbon dioxide allowed reactions to take place with nitrogen bases and alkyl halides 3 to give alpha-alkyl ketones 1(R) after acidic hydrolysis. The sequence thus represents the use of carbon dioxide as a removable directing group for the selective monoalkylation of lithium enolates 2(Li+). The roles of lithium salts in …