Acetylene alcohols

R SiH and CH2= CHR interact with both PtL and PtL 1. Complexing or chelating ligands such as phosphines and sulfur complexes are exceUent inhibitors, but often form such stable complexes that they act as poisons and prevent cute even at elevated temperatures. Unsaturated organic compounds are preferred, such as acetylenic alcohols, acetylene dicarboxylates, maleates, fumarates, eneynes, and azo compounds (178—189). An alternative concept has been the encapsulation of the platinum catalysts with either cyclodextrin or in thermoplastics or siUcones (190—192). 

This one-step procedure is a convenient and general method for the preparation of carbamates. It is substantially simpler, quicker, and safer than the multistep methods hitherto used for the preparation of carbamates of tertiary alcohols. This procedure is applicable to the preparation of carbamates of primary, secondary, and tertiary alcohols and mercaptans, polyhydric alcohols, acetylenic alcohols, phenols, and oximes. It has also been extended to the preparation of carbamyl derivatives (i.e., ureas) of inert (non-basic) amines.10... 

Galantay. ., Baeso, 1., and Coombs, R. V.. The preparation of a-alicnic alcohols. Acetylene alicne homologization . Synthesis, 344, 1974. 

In commercial polyethylene operations, poisons may enter the process as trace (ppm) contaminants in ethylene, comonomer, hydrogen (CTA), nitrogen (used as inert gas), solvents and other raw materials. These poisons reduce catalyst activity. Most damaging are oxygen and water. However, CO, CO, alcohols, acetylenics, dienes, sulfur-containing compounds and other protic and polar contaminants can also lower catalyst performance. With the exception of CO, aluminum alkyls react with contaminants converting them to alkylaluminum derivatives that are less harmful to catalyst performance. Illustrative reactions of contaminants with triethylaluminum are provided in eq 4.9-4.11 ... 

Although much weaker than the strong mineral acids (sulfuric, hydrochloric, nitric), the carboxylic acids are tremendously more acidic than the very weak organic acids (alcohols, acetylene) we have so far studied they are much stronger acids than water. Aqueous hydroxides therefore readily convert carboxylic acids into their salts aqueous mineral acids readily convert the salts back into the carboxylic acids. Since we can do little with carboxylic acids without encountering... 

Use Blast furnaces copper smelting steel production (basic oxygen converter process) manufacture of synthesis gas for production of ammonia, methyl alcohol, acetylene, etc. oxidizer for liquid rocket propellants resuscitation, heart stimulant decompression chambers spacecraft chemical intermediate to replace air in oxidation of municipal and industrial organic wastes to counteract effect of eutrophication in lakes and reservoirs coal gasification. 

Structure and functional group HC=C— CH2—OH, primary hydroxyl group Synonyms propargyl alcohol acetylene carbinol... 

Acetylene black. See Carbon black Acetylene carbinol. See Propargyl alcohol Acetylene dichloride. See cis-trans-1,2-Dichloroethylene (mixed isomers) trans-Acetylene dichloride. Seetrans-1,2-Di ch I oroethy lene... 

Reactions with organic compounds. HOF converts alkenes into a-fluoro alcohols, acetylenes mainly into a-fluoro carbonyl compounds [11], aromatic compounds (benzene and its monosubstituted derivatives, p-xylene, naphthalene) into phenolic products [12], and octa-ethylporphyrin into the N-oxide [13]. 

The ring inversion barrier for (46 /i = 2) was measured (n.m.r.) and found to be 75 kJ mol an Jf-ray structure determination of this compoimdhas been reported, together with that of l,8-bis(propyn-l -yl)naphthalene. Other acetylenes prepared include a-ethynylamines (47) from the corresponding alcohols acetylenic ethers or tertiary amines (48) by reaction of... 

N,N-dimethyl(3-myristoylaminopropyl)ammonio]propanesulfon-ate (Amidosulfobetaine-14) l-(3-Sulfopropyl)pyridinium betaine 3-Dodecyldimethylammoniopropane-l-sulfonate 3-[(3-cholamidopropyl)dimethylammonio]-l-propanesulfonate Lauryl betaine Cocamidopropyl betaine n-d odecyl-N,N-d imethylglycine Tallowglycine Perfluorooctanesulfonate Perfluorinated carboxylic acids Perfluorooctanoic acid Fluorinated telomere alcohols Acetylene diols Acetylene diol alkoxylates Acetylene glycols... 

The synthesis of OMC involves the use of ordered mesoporous silica (OMS) template with a specific pore topology [7]. As illustrated in Figure 3.1, the appropriate carbon precursor (carbon sources such as sucrose, furfuryl alcohol, acetylene gas, pyrrole, and acrylonitrile) is fed into the pores of the template via the infiltration approach, followed by its carbonization to achieve the siUca-carbon composite and template removal in ethanol-water solution of HF or NaOH to obtain the mesoporous carbon replica. The structure of the as-obtained OMC strongly depends on the structure of the used template. Chang et al. [7] have reviewed the synthesis of OMC as support materials for fuel cell applications. The rod- and tube-type mesoporous carbon structures can be realized by filling carbon precursors in the template pores and coating carbon precursors as a thin film on the pore walls of the template, respectively. In order to get the well-defined structure of OMC, the template should have three-dimensional interconnected pore structure. On the other hand, the carbonization of the carbon precursors should be confined exclusively within the mesopores of the ordered mesoporous silica templates with sufficient carbon precursor filling therefore, before the pyrolysis process, the carbon soiu-ce should be converted to a cross-linked polymer induced by the use of the acid polymerization catalysts [5,7]. 

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