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Acids, organic unsaturated

Chlorosulfonic acid Saturated and unsaturated acids, acid anhydrides, nitriles, acrolein, alcohols, ammonia, esters, HCl, HF, ketones, hydrogen peroxide, metal powders, nitric acid, organic materials, water... [Pg.1207]

Mercury(II) nitrate Acetylene, aromatics, ethanol, hypophosphoric acid, phosphine, unsaturated organic compounds... [Pg.1209]

Mercury(II) cyanide Mercury(I) nitrate Mercury(II) nitrate Fluorine, hydrogen cyanide, magnesium, sodium nitrite Phosphorus Acetylene, aromatics, ethanol, hypophosphoric acid, phosphine, unsaturated organic compounds... [Pg.1478]

The amidation of unsaturated acids or esters (not necessarily a,(3 unsaturated ones) leads to derivatives of the corresponding dicarboxylic acids and may serve as a method for the synthesis of dicarboxylic acids from unsaturated monocarboxylic acids (10,13, 14). This reaction of formamide with oc,(3-unsaturated acid derivatives besides being of synthetic value has some interesting aspects as far as free radical chemistry and photochemistry are concerned. We shall start this section in discussing the last point, i.e. the photochemical aspects of the reaction. This point is of primary interest to the synthetic organic chemist, who must be aware of it, otherwise he may fail in his synthetic work purely because of photochemical reasons. [Pg.96]

Dunnick and O Leary [149] examined the lipid composition of a number of bacteria both sensitive and resistant to polymyxin and tetracycline. All fatty acid extracts from antibiotic resistant Gramnegative organisms contained higher concentrations of cyclopropane acids than the corresponding extracts from sensitive organisms. Thus, cyclopropane acids and unsaturated fatty acids appear to play a role in the integrity of the penetration barrier at least for polymyxin and tetracycline. [Pg.356]

Zhu, L., Wehmeyer, R. M., Rieke, R. D. The direct formation of functionalized alkyl(aryl)zinc halides by oxidative addition of highly reactive zinc with organic halides and their reactions with acid chlorides, -unsaturated ketones, and allylic, aryl, and vinyl halides. J. Org. Chem. 1991,56, 1445-1453. [Pg.638]

Gamma-lactones are quite prevalent in biolipids and in microbiological transformation products. Any of these may be the source of y-lactones. Hydroxy-acids and unsaturated acids may also be the source of y-lactones in Aleksinac shale. If y-lactones were found to be typical for certain class of sediments, they might shed more light on the source of the organic matter of these sediments. [Pg.55]

The other known pathway of UFAs synthesis, by action of fatty acid desaturases, functions only in aerobic organisms, where desaturation of full-length fatty acids to unsaturated derivatives can occur (Tocher et al., 1998). [Pg.74]

The transition temperature itself depends on the composition of the lipids in the membrane. Membrane lipids with shorter fatty acids or unsaturated fatty acids have lower transition temperatures. In addition, the composition of the polar head group can have a drastic effect. For example, an ethanolamine head group raises the transition temperature compared to a choline head group. Organisms have membrane compositions consistent with transition temperatures somewhat below their lowest body temperature. [Pg.1819]

CHEMICAL PROPERTIES combustible liquid corrosive to metals volatile with steam strongly alkaline may readily absorb carbon dioxide from air to form a nonvolatile carbonate reactions with acetic acid, nitric acid, sulfuric acid, acrylonitrile, oleum, and other selected acids and unsaturated compounds caused the temperature and pressure in a closed container to rise reacts vigorously with oxidizing materials, chlorine, hypochlorite, halogen-ated compounds, and reactive organic compounds FP (43°C, 110°F) LFL/UFL (2.5%, 12% at 2I2 F) AT (385°C, 725°F) HC (-452.6 kcal/gmol at 25°C) HF (-63.0 kJ/mol liquid at 25°C) Hf (22.6 kJ/mol at 284.2K). [Pg.624]

During heating to 150-220° C polyolefins isolate thermooxidative products of macromolecules with pronounced toxic properties, namely organic acids, ethers, unsaturated hydrocarbons, peroxide and carbonyl compounds (formaldehyde and acetaldehyde), carbon oxide and dioxide, etc. A mixture of such products of the thermooxidative destruction of polyolefins may result in acute chronic poisoning on inhalation. [Pg.361]

Unsaturated polyester resins (UPR) form the bulk of all resins used for laminating applications. The basic materials used to make a polyester resin are a dibasic organic acid or anhydride and a dihydric alcohol. A portion of the dibasic acid is unsaturated, through which crosslinking occurs. [Pg.18]

Usmani and Wahab ° determined the adsorption of lower aliphatic and some organic unsaturated fatty acids from their aqueous solutions on activated carbons prepared from wood, rice husk, and lignite coal. The adsorption depended on the porosity and the chemical stfucture of the carbon surface. It was also found that for a given acid the adsorption depended on the polarity of the carboxylic group, the length of the side chain, and the nature of the type of bonding. The adsorption followed both the Langmuir and the Freundlich adsorption equations. [Pg.434]

Virtually all of the reported work to date has been with organic species such as amines and amino-acids, which can be dissolved in the form of salts and then form onium compounds by ion-exchange with cations on the clay surfaces. The main variables are the number of chains attached to the nitrogen of the amine, (i.e., is it a primary, secondary, tertiary or quaternary amine ), the length distribution and branching of these chains, whether they are simple hydrocarbons or carry some other functionality such as carboxylic acid or unsaturation and finally, their concentration on the filler surface. [Pg.500]

Amino acids bearing unsaturated vinyl or allyl groups can be grafted onto pendant hydridosiloxanes by hydrosilylation (14,15). The hydrosilylation reaction involves the addition of Si-H functional compounds to unsaturated organic compounds in the presence of a transition metal catalyst, usually platinum. Several amino acid functionalized siloxanes have been prepared this way first by synthesizing allylcarboxy... [Pg.129]

Polyesters and vinyl esters Based on organic unsaturated polyester dissolved in unsaturated monomer, cured by free radical reaction catalyzed by peroxide used mainly for lining due to their good acid and chemical resistance. [Pg.558]

Compound 20 is a 1,5-difunctional compound. Therefore one can design a synthesis that proceeds via intermediates that only contain odd difimctional relationships. Propose such a synthesis and indicate potential problems with your approach. If you can t get started, have a look at the following reference Ballester, P Costa, A. Raso, A. G. Gomez-Solivellas, A. Mestres, R. Dienediolates from Unsaturated Carboxylic Acids. Michael Addition of Dilithium 1,3-Butadiene-1,1-diolate (from Crotonic Acid) to Unsaturated Ketones J. Chem. Soc., Perkin 1 Organic and Bio-Oi anic Chemistry 1988, 1711-1717. (Unnatural Products-2)... [Pg.275]

Nickel is a moderately lustrous, silvery metal, and is extensively used in alloys (for example coinage, stainless steel) and for plating where a durable resistant surface is required. It is also used as an industrial catalyst, for example in the hydrogenation of unsaturated organic compounds. It is attacked by dilute aqueous acids but not by alkalis it combines readily with many non-metals on heating. [Pg.406]

Alkyds are formulated from polyester resins, cross-linking monomers, and fillers of mineral or glass. The unsaturated polyester resins used for thermosetting alkyds are the reaction products of polyfunctional organic alcohols (glycols) and dibasic organic acids. [Pg.1013]

Other Syntheses. Acryhc acid and other unsaturated compounds can also be made by a number of classical elimination reactions. Acrylates have been obtained from the thermal dehydration of hydracryhc acid (3-hydroxypropanoic acid [503-66-2]) (84), from the dehydrohalogenation of 3-halopropionic acid derivatives (85), and from the reduction of dihalopropionates (2). These studies, together with the related characterization and chemical investigations, contributed significantly to the development of commercial organic chemistry. [Pg.155]


See other pages where Acids, organic unsaturated is mentioned: [Pg.120]    [Pg.96]    [Pg.262]    [Pg.212]    [Pg.412]    [Pg.359]    [Pg.1136]    [Pg.123]    [Pg.488]    [Pg.110]    [Pg.74]    [Pg.396]    [Pg.160]    [Pg.57]    [Pg.482]    [Pg.235]    [Pg.303]    [Pg.137]    [Pg.332]    [Pg.85]    [Pg.296]    [Pg.253]    [Pg.799]    [Pg.59]    [Pg.104]    [Pg.133]    [Pg.167]    [Pg.248]    [Pg.331]    [Pg.115]   
See also in sourсe #XX -- [ Pg.763 ]




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