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Acidic solids

Interpretation of spectra. The infrared spectrum of m-hydroxybenzoic acid (solid ground in Nujol) is shown in Fig. A, 7, 1. The more important bands may be interpreted as follows. [Pg.1140]

This interpretation is supported by literature studies on copper(II) complexes containing two -amino-acid ligands. For N-unsubstituted -amino-acid ligands, deductions as to position of the cis -trans geometrical equilibrium in solution are difficult as illustrated by the fact that for some -amino acids solid complexes have been isolated of both the ds and trans geometry. In contrast it seems as if copper(II) complexes containing two N-alkylated -amino-acid ligands crystallise exclusively in the trans form ". ... [Pg.95]

Acetic acid (solid), CC1H4OC1 -2,251 Oxalic acid, C iH i04 -2,290... [Pg.248]

ALKYL,ARYL,OR TOLUENE SULFONIC ACID, SOLID containing more than 2585 ... [Pg.196]

Add coiicentiated sulphiuic acid to a little formic acid, solid le.id formate, or other salt and heat. Caibon monoxide is evohed, and maybe lighted at the mouth of the test-tube. (llCO()),l b4-lI,SO,-f bbO, + 2lI,04-2CO. See Appendix, p. 25c . [Pg.109]

Dinitronaphthalene-2-sulfonic Acid. Solid which explds on heating prepd by nitration of 8-nitronaphthalene-2-sulfonic ac with mixed ac at 0-15° (Ref 2)... [Pg.195]

A modified Pechmann microwave-assisted reaction has been reported using an electron-rich phenol 229 and an a,/l-unsaturated acid in order to obtain coumarins without a substituent in position 4 [147]. Even in this case, the use of an acid solid catalyst (the support) was needed. Best results were obtained with Dowex or Amberhte-15 at 120 °C for 15 min (Scheme 84). [Pg.255]

This work is a contribution to the understanding of the effect of spillover hydrogen in a type of catalyst of considerable industrial importance, namely that composed of transition metal sulfides and amorphous acidic solids. This is typically the case of sulfided CoMo supported on silica-alumina used for mild hydrocracking. [Pg.97]

Fig. 5 (a) The pH versus log hydrolysis rate constant profile of idoxuridine at 60°C (solid line). The dashed lines indicate the individual contributions of each kinetic term, (b) pH versus log hydrolysis rate constant profile of acetylsalicylic acid (solid line). The dashed lines indicate the individual contribution of each kinetic term. Adapted from Refs. 105 and 106. [Pg.163]

Chloranil, photocycloaddition with butadiene, 474 Chlorophylls, 552 Chu, N. Y. C 439 Ciamician, G., 1, 2,459 Cinnamic acid, solid state photodimerization, 476... [Pg.296]

W Higuchi, EL Parrot, DE Wurster, T Higuchi. Investigation of drug release from solids II. Theoretical and experimental study of influences of bases and buffers on rates of dissolution of acidic solids. J Am Pharm Assoc 47 376-383, 1958. [Pg.157]

Methyl vinyl ether is rapidly hydrolysed by contact with dilute acids to form acetaldehyde, which is more reactive and has wider flammability limits than the ether [1], Presence of base is essential during storage or distillation of the ether to prevent rapid acid-catalysed homopolymerisation, which is not prevented by antioxidants. Even mildly acidic solids (calcium chloride or some ceramics) will initiate exothermic polymerisation [2],... [Pg.437]

Sethuraman VA, Lee MC, Bae YH (2008) A biodegradable pH-sensitive micelle system for targeting acidic solid tumors. Pharm Res 25 657-666... [Pg.28]

It is of primary interest to avoid corrosive mineral acids in synthetic processes. This can easily be achieved by use of acidic solid supports coupled with microwave irradiation. This has been applied to the preparation of quinolines [53] (Scheme 8.35). This procedure is a safe, green alternative to the use of H2S04 at more than 150 °C. In the same way, quinoxaline-2,3-diones were prepared [54] by use of single-mode irradiation. Previous attempts in solution led to explosions, but the authors successfully used solvent-free conditions with acidic supports or catalysts (the best being p-toluenesulfonic acid) and irradiation times of 3 min (Scheme 8.36). [Pg.271]

Nafion-H, a perfluorinated sulfonic acid resin, is another strongly acidic solid that has been explored as alkylation catalyst. Rprvik et al. (204) examined unsupported Nafion-H with a nominal surface area of 0.2 m2/g (surface area of a swellable polymer is difficult to define) in isobutane/2-butene alkylation at 353 K and compared it with a CeY zeolite. The zeolite gave a better alkylate and higher conversion than Nafion-H, which produced significant amounts of octenes and heavy-end products. The low surface area of the resin and questions about the accessibility of the sulfonic acid groups probably make the comparison inadequate. [Pg.291]

Figure 9.21 Infrared spectrum of aspirin, i.e. 2-acetoxybenzoic acid. (Solid aspirin was prepared within a Nujol mull)... Figure 9.21 Infrared spectrum of aspirin, i.e. 2-acetoxybenzoic acid. (Solid aspirin was prepared within a Nujol mull)...
Parry, E.P. An infrared study of pyridine adsorbed on acidic solids. Characterization of surface acidity. J. Catal. 1963, 2, 371-379. [Pg.58]

Very many acidic solids and liquids, immiscible with hydrocarbons, will catalyse the oligomerisation of isobutene at ambient temperatures. Among the more common are syncatalysts prepared from boron fluoride and a protonic substance BH (B = OH, CHsO, C2H50, t-C4H90, CH3C02, etc.) mineral acids natural and synthetic alumino-silicates, (e.g., Fuller s earth, bentonite, attapulgite) and metal oxides containing small quantities of water. [Pg.57]

Chuy, C., Basura, V. L, Simon, E., Holdcroft, S., Horsfall, J. A. and Lovell, K. V. 2000. Electrochemical characterization of ethylenetetrafluoroethylene-g-polystyrenesulfonic acid solid polymer electrolytes. Journal of the Electrochemical Society 147 4453 58. [Pg.172]

The reachon of benzene with ethylene or propylene to form ethylbenzene or isopropylbenzene (cumene) is an industrially important transformahon, with ethylbenzene as the key building block for polystyrene and cumene as the feedstock for phenol produchon [55]. Fthylbenzene was originally produced with a Lewis acid catalyst consishng of AlCfi or a Bronsted acidic solid phosphoric acid (SPA) catalyst [56]. Both catalyst systems suffered from equipment corrosion so, in the 1980s the Mobil-Badger vapor phase alkylation process was introduced, which... [Pg.364]

A( ueous solutions of chromium(ll) sulfate have Ijeen prepared from chromium(lll) sulfate by reduction with zinc powder and from potassium dichromate by reduction with amalgamated zinc and sulfuric acid. Solid chromitim(II) sulfate penlahyrlrate can be obtained from the reaction of highly purified chromium metal... [Pg.133]

Adsorption and electrokinetic effects of amino acids, solid-aqueous interface, 311-26 Adsorption density, equilibrium PAA at various pH values, 299f PAA on hematite, 304f SDS with and without polymer, 298f,303f... [Pg.342]


See other pages where Acidic solids is mentioned: [Pg.226]    [Pg.39]    [Pg.203]    [Pg.268]    [Pg.606]    [Pg.50]    [Pg.591]    [Pg.71]    [Pg.439]    [Pg.441]    [Pg.177]    [Pg.126]    [Pg.98]    [Pg.877]    [Pg.126]    [Pg.132]    [Pg.169]    [Pg.132]    [Pg.77]    [Pg.383]    [Pg.134]    [Pg.63]    [Pg.64]    [Pg.325]    [Pg.261]    [Pg.34]   
See also in sourсe #XX -- [ Pg.39 ]

See also in sourсe #XX -- [ Pg.418 ]

See also in sourсe #XX -- [ Pg.39 ]




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5- barbituric acid, solid phase

A Possible Benchmark for Solid Metal Fluoride, Lewis Acids Aluminium Chlorofluoride

Acetic acid solid state structure

Acid catalysts, solid theory

Acid-Base Interaction on Solid Surface

Acid-Base Solids

Acid-base interaction, solid surface

Acidic Properties in the Solid State

Acidic and Basic Properties on Solid Surfaces

Acidic sites on solid surfaces

Acids solid phosphoric

Activation and Aromatization of Propane on Solid Acid Catalysts

Activation of Bridged Metallocenes by Solid Acid Supports

Alkane Cracking and Isomerization on Solid Acid Catalysts

Alkylation solid acid processes

Alkylation with Solid Acid Catalysts

Alkylation, zeolitic solid acid catalyzed

Alkylation, zeolitic solid acid catalyzed kinetics

Amino acids solid phase peptide synthesis

Amino acids solid-phase extraction

Amino acids, bromination, solid-phase

Amino acids, bromination, solid-phase H-atom transfer

Amino acids, bromination, solid-phase conjugate additions

Ammonium chloride , solid acid catalyst

Amorphous Solid Sulfonic Acids

Benzilic acid rearrangement solid state

Biodiesel production solid acid catalysts

Carbon-based solid acid

Carboxylic acids solid phase peptide synthesis

Catalysis by Solid Acids and Bases

Catalysis by solid acids

Catalytic Cracking of Heavy Oil over Solid-acid Catalysts

Cinnamic acid, solid state photodimerization

Commercial solid acid catalysts

Commercial solid acid catalysts coking

Commercial solid acid catalysts zeolite

Corrosive solid, acidic, inorganic

Corrosive solid, acidic, organic

CsHSO4, solid acids

Cyclisations, solid acid catalysed

Enhanced Acidity Solids

Envirocat EPIC a versatile solid acid

Experimental Techniques Applied to Solid Acids

Formic acid solid state structure

Functionalized carbon materials solid acids

Glycolic acid solid support

Green, Acid Solid

HYBRIDIZATION WITH NUCLEIC ACID PROBES solid phase

Heat capacity Solid amino acids

Heterogeneous solid acid catalysts

Heterogeneous solid acids

Hydrochloric Acid - from Solid Sodium Chloride

Hydrochloric acid , solid-state

Hydroxamic acids solid-phase synthesis

Insulators and Solid Acids

Lactic acids melt/solid polycondensation

Lewis acids, solid superacids from

Measurement of Acid Site Concentration and Strength in Microporous Solids

Mesoporous metal oxide solid acids

Microporous Solids as Acid Catalysts

Miscellaneous Polymerization over Solid Acids and Bases

Miscellaneous Solid Acids

NMR Studies of Solid Acidity Using Probe Molecules

Nanostructured metal oxide solid acid

Nitration solid acid catalyzed

Novel solid acids

Nucleic acids solid-phase extraction

Nucleic acids synthesis, solid phase

Oleic acid into solid acids, Conversion

Oligomerization of Lower Olefins with Solid Acid Catalysts

One-Pot Sequential Synthesis System Using Different Particles of Solid Acid and Base Catalysts

Organic Catalysis with Ordered Solid Sulfonic Acids

Organic acids solid-phase extraction

Organic solids, surface acidity

Organic solids, surface acidity basicity

Other Solid Acids

Other Solid-acid Catalysts

Periodic acid solid-supported

Poisoning of Solid Acids

Poisoning solid acids

Processes Using Solid-State Acid Catalysts

Proton conduction mechanism in n solid acidic hydrates

Reactions over Microporous Solid Acids

SOLID-PHASE SYNTHESIS OF HETEROCYCLES FROM PEPTIDES AND AMINO ACIDS

Sodium hydroxide solid acids

Solid Acid Catalyzed Reactions

Solid Acid-Catalyzed Processes

Solid Acids and Bases as Catalysts

Solid Bronsted acid-Lewis base catalysis

Solid Bronsted acidity

Solid acid

Solid acid

Solid acid addition

Solid acid alkylation catalysts

Solid acid and base

Solid acid catalysis

Solid acid catalyst process

Solid acid catalysts

Solid acid catalysts Bronsted acidic strengths

Solid acid catalysts acidic strength characterization

Solid acid catalysts acidity characterization

Solid acid catalysts adsorbed basic probe molecules

Solid acid catalysts coking

Solid acid catalysts distribution

Solid acid catalysts overall acidity

Solid acid catalysts reaction mechanism

Solid acid catalysts sulfated carbons

Solid acid catalysts sulfated metal oxides

Solid acid catalysts waste minimization

Solid acid catalysts zeolite

Solid acid catalysts, isobutane

Solid acid catalyzed alkylation

Solid acid catalyzed alkylation isobutane with 2-butene

Solid acid fuel cells

Solid acid salts

Solid acid supports

Solid acidic drugs

Solid acidity

Solid acidity chemical shift

Solid acidity computational chemistry

Solid acidity probe molecules

Solid acidity sample preparation

Solid acids Diels-Alder reactions

Solid acids Friedel-Crafts acylations

Solid acids Friedel-Crafts alkylations

Solid acids Friedel-Crafts reactions

Solid acids Hammett acidity value

Solid acids Michael additions

Solid acids acid site type

Solid acids acid strength

Solid acids acidity enhancement

Solid acids aldol condensations

Solid acids alkylations

Solid acids aluminosilicates

Solid acids amide formation

Solid acids and base-catalyzed clean

Solid acids and base-catalyzed clean technologies

Solid acids clays

Solid acids ester formation

Solid acids ether formation

Solid acids hydrocarbon conversion

Solid acids isopropanol reaction

Solid acids with enhanced acidity

Solid adipic acid concentration

Solid electrolyte sulfonic acid membranes

Solid extractants mineral acid extraction

Solid phosphoric acid catalyst

Solid state structures carboxylic acids

Solid superacids acid strength

Solid superacids acidity estimation

Solid superacids acidity measurements

Solid surfaces, acid-base character

Solid surfaces, acid-base character Lewis acidity

Solid surfaces, acid-base character acidic

Solid surfaces, acid-base character basic

Solid surfaces, acid-base character oxides

Solid-acid Catalysts-Aromatic Substitution

Solid-acid-based Nitration

Solid-phase linkers acid-labile

Solid-phase peptide synthesis acid labile linkers

Solid-phase peptide synthesis amino acid side chain protecting groups

Solid-phase peptide synthesis coupling protected amino acids

Solid-phase peptide synthesis polymer-bound amino acid

Solid-phase synthesis of unnatural amino acids and peptides

Solid-phase synthesis, of sugar fatty acid

Solid-phase synthesis, of sugar fatty acid monoesters

Solid-state fermentation organic acids production

Solids acid-base salts

Solids stearic acid adsorption

Solids, cinnamic acid derivatives

Strength and Amount of Solid Acid

Studies of Solid Acids and Base-Catalyzed Clean Technologies

Supercritical Phase Alkylation Reactions over Solid Acid Catalysts

Surface acidity of solid catalysts

Surface solid, acid strength

Types of Solid Acid

Typical Solid Acid Catalysts

Ugi Reaction with Solid-Supported Carboxylic Acid

White solid acidity, alterations

White solid acids

Zeolites as Solid Acid Catalysts

Zeolites solid acids

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