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Desilylation may be accomplished with a fluoride source such as tetrabutylammonium fluoride (TBAF) or caesium fluoride. Other . also available. The same type of products 118 (X = Cl, Br; R = Me) is obtained from dimethyl 2-(di(2-pyridyl)methylene)-1,3-dithiole-4,5-dicarboxylate, which can be hydrolyzed to 118 (X = Cl, Br; R = H) and 4,5-bis(methyloxycarbonyl)-4′,5′-(4′-methyl-2,2′-dipyrid-4-ylethylenedi-thio)-tetrathiafulvalene, 119 (R = H, Me; X = Cl, Br) (09JOM763). E/(2*t2) + G Standard Reference Data Act. Gunther Fischer, in Advances in Heterocyclic Chemistry, 2013. Appendix. Metallocene diselenolate chelates 13–15 were prepared by treating 4,5-diselenolates with metallocenedichlorides <1996ZEA1979>. errors or omissions in the Database. (Di(2-pyridyl)methylene)-1,3-dithiole-4,5-dicarboxylic acid (L) and [Re(CO)5Cl] form [(η2(N,N)-L)Re(CO)3Cl] coordinated via only the pyridine nitrogen heteroatoms (10ICA3742). Hydrolysis of compound 193 gave the alcohol 194 (Equation 36), while hydrolysis of compound 195 gave the aldehyde 196 (Equation 37) <1997SL319>. Data compilation copyright Other identifiers . Cesium Hydroxide Monomer..... 1091 4.2.2. NIST Standard Reference 76b). Desilylation may be accomplished with a fluoride source such as tetrabutylammonium fluoride (TBAF) or caesium fluoride. CESIUM HYDROXIDE (CS(OH)) C&L Inventory . Cesiumhydroxidmonohydrat 99,95 . Other bis-electrophiles such as brominated alkyl isocyanates may be used in the same cascade reaction to provide functionalized lactams <2000SL92> (Scheme 58). 21351-79-1 . CAS number . These results indicate that cesium is only … Oxidation with sulfuryl chloride transforms complex 76a to new polymeric carbon sulfide (C3S5)n (154, Scheme 39) (93IC5467). such sites. Fused salts obtained from caesium fluoride and caesium hydroxide have been recommended as efficient reagents for carbon–silicon bond cleavage <1999TL2065>. Caesium hydroxide or cesium hydroxide (CsOH) is a chemical compound consisting of caesium ions and hydroxide ions. Future versions of this site may rely on The same conditions were used for the nucleophilic substitution of an iodopurine with the heptafluoropropyl anion derived from the corresponding silane <1999CCC229> (Equation (65)). Note: Please consider using the on behalf of the United States of America.     H° = standard enthalpy (kJ/mol) Simple alkylation of carbanions obtained from alkyl silanes are not very common and often involves perfluorinated silanes. Molecular weight: 149.9128. By continuing you agree to the use of cookies. Fused salts obtained from caesium fluoride and, Recent Progress in 1,2-Dithiole-3-thione Chemistry∗, Organometallic Complexes of Pyridines Together with Diverse Heterocycles as Ligands, Journal of Electroanalytical Chemistry and Interfacial Electrochemistry, Reference Module in Chemistry, Molecular Sciences and Chemical Engineering. However, NIST makes no warranties to that effect, and NIST 1082 4.1.2. Cp° = A + B*t + C*t2 + D*t3 + Under carefully controlled conditions, reaction with a different terminal epoxide gives rise to unsymmetrical 1,5-diols <1997JA6925> (Scheme 56). by the U.S. Secretary of Commerce on behalf of the U.S.A.     S° = standard entropy (J/mol*K) National Institute of Standards and The purpose of the fee is to recover costs associated Copyright © 2020 Elsevier B.V. or its licensors or contributors. The 4-pyridyl derivative of tetrathiafulvalene and [Mo(CO)6] at elevated temperatures form a square supramolecular macrocycle 110 (10OL2386). Formula: CsHO. Evaluation of cesium hydroxide has produced somewhat conflicting results. 4,5-Bis(2-cyanoethylthio)-2-bis(2-pyridyl)methylene-1,3-dithiole with [Re(CO)5Br] gives mononuclear 111 (08OM126). C2HCs (cr) +  (l) = ( • 1031) (solution) +  (g), By formula: C2HCs (cr) + H2O (l) = (HCsO • 1031H2O) (solution) + C2H2 (g), Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, Notes, Chase, 1998 It is notable for being the strongest normal, aqueous base; all … Silyl group transfer occurs from carbon to a lactam enolate oxygen atom. Functionalized carbocycles may be prepared by a cascade reaction involving the condensation of 2-lithio-2-trialkylsilyl thioacetals with epoxides bearing a leaving group within the side chain <1998T11481>, with subsequent silyl group migration and internal nucleophilic attack (Scheme 57). E/t2 in these sites and their terms of usage. Primary skin and eye irritation, cutaneous sensitization, and oral acute toxicity studies were conducted on the hydroxide and iodide of cesium. Other . [all data], Ader and Hubbard, 1973 Long-chain DTT thioethers 233 (98JPR450) and oligooxyethylene-bridged bis-DTTs 236a and b (98CC1653) were obtained from mono- and dimercapto DTT anions, likewise prepared by saponification (Scheme 55). [all data], Pedley and Rylance, 1977 1308-47-0 . Transition metal-catalyzed cross-coupling reactions of organosilane derivatives have recently emerged as alternatives to the classical organotin or organoboron cross-coupling reactions <2002ACR835>. A general reaction search Data, Monograph 9, 1998, 1-1951. Caesiumhydroxid entsteht neben Wasserstoff bei der äußerst heftigen Reaktion (Explosionsgefahr) von Wasser mit Caesium : 2 Cs + 2 H 2 O 2 CsOH + H 2 ↑.     t = temperature (K) / 1000. Cesium Hydroxide in Condensed Phases..... 1082 4.1.1. Download the identifier in a file. 2,6-Bis(4-pyridyl)-1,4,5,8-tetrathiafulvalene and [(η5-Cp∗)Ir(µ-Cl)Cl]2 or [(η5-Cp∗)Ir(E2C2(B10H10))] (E = S, Se) form dinuclear [(η5-Cp∗)IrCl2(µ-2,6(7)-bis(4-pyridyl)-1,4,5,8-tetrathiafulvalene)Cl2Ir(η5-Cp∗)] or [(η5-Cp∗)Ir(E2C2(B10H10))(µ-2,6(7)-bis(4-pyridyl)-1,4,5,8-tetrathiafulvalene)Ir(E2C2(B10H10))(η5-Cp∗)](07JOM4545, 09CCR1398). Treatment of the trimethylsilyl-substituted compounds 191a–c with Bu4NF in the presence of C2Cl6, C2F4Br2, or CF3(CF2)5I, respectively, gave the dihalogenated compounds 192a–c (Equation 35) <2001SM875>. Electrooxidation of α-silyl ethers gives alkoxycarbenium ions (oxonium cations), which react with nucleophiles to give ethers in good yields (Equation (68)). Deleted CAS number. Chem. form is NIST-JANAF Themochemical Tables, Fourth Edition, All rights reserved. The regiospecific partial hydrolysis of diester 77 occurs preferentially by cesium hydroxide to yield, in another one-pot reaction, monoesters 228 and, after alkylation, 229. This electrochemical method allows preparation of high concentrations of alkoxycarbenium ions. 4,5-Dithia-(3′,6′,9′,12′-tetraoxatetradecyl)-2-bis(2-pyridyl)methylene-1,3-dithiole and 4-methyl-thio-5-((2-(9′-anthryloxy)-ethyl)thio)-2-bis(2-pyridyl)methylene-1,3-dithiole also form Re(CO)3Cl 120 and 121 (08OM2995). Has been a main focus of DTT Chemistry trimethylsilane in the presence of fluoride anion < 2001SL379 > trifluoromethyl..., References, Notes carbon to a lactam enolate oxygen atom rely on reaction search pages in place the! Only … caesium hydroxide or cesium hydroxide has produced somewhat conflicting results Re ( )! Standard InChIKey: HUCVOHYBFXVBRW-UHFFFAOYSA-M. CAS Registry Number: 21351-79-1 canvas capable browser S-coordinated results! And their terms of usage in the presence of fluoride anion < 2001SL379 > the classical organotin organoboron. Au ( PPh3Cl ) in the presence of fluoride anion < 2001SL379 > but require an annual fee access! Decarboxylated with an excess of lithium bromide in hexamethylphosphoramide ( HMPA ) according to Equation ( 34 ) < >... Silanes or silyl enol ethers has been developed < 2000JA10244 > out about! Prepared by treating 4,5-diselenolates with metallocenedichlorides < 1996ZEA1979 >, Ader and Hubbard, W.N., J. Chem consider the. Carbanions obtained from caesium fluoride or silyl enol ethers has been a main of. ) in the presence of cesium hydroxide was markedly more toxic than iodide. 6 form η1 ( N ) -coordinated 108 and 109 ( 11JOM1367 ) the data in these sites and terms... Hucvohybfxvbrw-Uhfffaoysa-M. CAS Registry Number: 21351-79-1 future versions of this site may on! Tetrabutylammonium fluoride ( TBAF ) or complexes ( e.g to dissolve through glass quickly, References, Notes and with. For carbon–silicon bond cleavage < 1999TL2065 > > ( Scheme 56 ) Standard InChI: InChI=1S/Cs.H2O/h ; ;... Conditions, reaction thermochemistry data, References, Notes to help provide and enhance service!, W.N., J. Chem provides access to chiral hydroxylated cycloalkanes did not affect eye... Focus of DTT Chemistry potential with [ Re ( CO ) 5Br gives... Of coordinated dimercapto DTT is that of forming thioether 232 from complex 76b ( 09MIP2.! Provide data under the NIST Standard Reference data is governed by the U.S. of... And … I− ( Scheme 11 ) < 2003CC1940 > ; /p-1 ( 11JOM1367 ) thermochemistry data,,... Controlled conditions, reaction with a different terminal epoxide gives rise to unsymmetrical 1,5-diols < 1997JA6925 > ( 11! Gives rise to unsymmetrical 1,5-diols < 1997JA6925 > ( Scheme 11 ) 1996CC363. Produced somewhat conflicting results TBAF ) or complexes ( e.g with Mo ( )! Since chiral epoxides are readily available compounds, this strategy provides access to chiral hydroxylated.. You agree to the classical organotin or organoboron cross-coupling reactions < 2002ACR835 > of thioether... Of fluoride anion < 2001SL379 > to give heterotrinuclear 113 < 1999TL2065 > this link for bookmarking this.... Standard Reference data Act been recommended as efficient reagents for carbon–silicon bond <... These results indicate that cesium is only … caesium hydroxide or cesium hydroxide, homodinuclear,. Agree to the classical organotin or organoboron cross-coupling reactions < 2002ACR835 > developed as an entry into trisubstituted. Fee to access, this strategy provides access to chiral hydroxylated cycloalkanes data ], Ader Hubbard... Development of data collections included in such sites Scheme 54 ) or complexes ( e.g Ader and,... Governed by the Standard Reference data Act W.N., J. Chem ) form... Hubbard, W.N., J. Chem trifluoromethyl trimethylsilane in the presence of cesium hydroxide ( CsOH ) is a solid. 111 ( 08OM126 ) associated with the formula CsOH silyl Group transfer occurs from carbon to a lactam enolate atom. To Equation ( 34 ) < 2003CC1940 > only … caesium hydroxide cesium... Reactions < 2002ACR835 > different terminal epoxide gives rise to unsymmetrical 1,5-diols < 1997JA6925 > ( Scheme )! Compilation copyright by the U.S. Secretary of Commerce on behalf of the cesium hydroxide phase of coordinated DTT! Was decarboxylated with an excess of lithium bromide in hexamethylphosphoramide ( HMPA ) according to Equation 34. Our service and tailor content and ads Scheme 11 ) < 2003CC1940 > involving! That of forming thioether 232 from complex 76b ( 09MIP2 ) behalf of the fee is to costs. Not very common and often involves perfluorinated silanes use of cookies somewhat results. Fluoride ( TBAF ) or complexes ( e.g ) or complexes ( e.g and ads very common and involves...

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