Abstracts Preparation

In addition to ordinary papers, there are two other types of publications in which original work is reported notes and communications. A note is a brief paper, often without a summary (nearly all papers are published with summaries or abstracts prepared by the author). Otherwise, a note is similar to a paper. Communications (also called letters) are also brief and usually without summaries (though some journals now publish summaries along with their communications, a welcome trend). However, communications differ from notes and papers in three respects ... 

We give below the title and authorship and table of contents of this review and an abstract prepared by Dr. Bhushan at our invitation. 

Chemical Abstracts. Author indexes subject indexes List of Periodicals Abstracted preparation of an abstract. 

Perry and coworkers (40 49, pp. 407, 435) developed a paper tape machine, the Western Reserve Selector, for searching abstracts prepared for the American Society for Metals. Its principles are now being incorporated by the General Electric Go. in the GE-250 (27). 

Schroeder ED, Scow KM, Converse BM, Scarano J, Watanabe N, Romstad K (2000) Extended abstract prepared for the USEPA/APl Workshop on the Biodegradation of MTBE. Cincinati, OH... 

Once the bibliographic data and abstract have been input, the individual pages that were scanned earlier are paginated and one or more pages are assembled into articles, each is associated with a control form (Abstract Preparation Sheet), and entered into the Openimage (01) workflow system, and routed to electronic work baskets for the analysis staff. Analysis staff access the workflow system to get their work directly from the analysis work baskets. When their work is finished, the document is automatically routed electronically to the next processing point or work basket. The scanned document records are purged at the end of the process. 

Knackstedt, M., Madadi, M., Ams, C., Baechle, G., Eberli, G., Weger, R., 2(X)8. Carbonate petrophysical parameters derived from 3d images. In Extended Abstract Prepared for Presentation at AAPG Annual Convention, San Antonio, Texas, April 20-23. Search and Discovery Article 40393 (2009). 

Alkenes in (alkene)dicarbonyl(T -cyclopentadienyl)iron(l+) cations react with carbon nucleophiles to form new C —C bonds (M. Rosenblum, 1974 A.J. Pearson, 1987). Tricarbon-yi(ri -cycIohexadienyI)iron(l-h) cations, prepared from the T] -l,3-cyclohexadiene complexes by hydride abstraction with tritylium cations, react similarly to give 5-substituted 1,3-cyclo-hexadienes, and neutral tricarbonyl(n -l,3-cyciohexadiene)iron complexes can be coupled with olefins by hydrogen transfer at > 140°C. These reactions proceed regio- and stereospecifically in the successive cyanide addition and spirocyclization at an optically pure N-allyl-N-phenyl-1,3-cyclohexadiene-l-carboxamide iron complex (A.J. Pearson, 1989). 

Acetylenic Grignard reagents of the type RC CMgBr are prepared not from an acetylenic halide but by an acid-base reaction in which a Grignard reagent abstracts a proton from a terminal aUcyne... 

An additional effect of the use of an organic medium in the catalyst preparation is creation of mote defects in the crystalline lattice when compared to a catalyst made by the aqueous route (123). These defects persist in the active phase and are thought to result in creation of strong Lewis acid sites on the surface of the catalysts (123,127). These sites ate viewed as being responsible for the activation of butane on the catalyst surface by means of abstraction of a hydrogen atom. 

Other Databases with Patent Information. The APIPAT database has been discussed, as have the unique capabihties of the merged WPI—APIPAT file on ORBIT. Many other databases contain substantial amounts of patent information, notable among them are Derwent s biotechnology Abstracts the TULSA database (petroleum exploration and production), several specialized pharmaceutical files, PAPERCHEM, and METADEX. A very complete listing of databases containing patent information circa 1990 has been prepared (38). 

B2qH240H] anion (75). Both B2QH24OH2 and [B2qH240H] are isoelectronic with the [B qH ] anion (77). The hydropolyborate ions formed by proton abstraction from decaborane are usehil intermediates for the preparation of metaHaboranes and heteroboranes. 

Inductive and resonance stabilization of carbanions derived by proton abstraction from alkyl substituents a to the ring nitrogen in pyrazines and quinoxalines confers a degree of stability on these species comparable with that observed with enolate anions. The resultant carbanions undergo typical condensation reactions with a variety of electrophilic reagents such as aldehydes, ketones, nitriles, diazonium salts, etc., which makes them of considerable preparative importance. 

Both common and systematic names of compounds are used throughout this volume, depending on which the Editor-in-Chief felt was more appropriate The Chemical Abstracts indexing name for each title compound, if it differs from the title name, is given as a subtitle Systematic Chemical Abstracts nomenclature, used in both the 9th and 10th Collective Indexes for the title compound and a selection of other compounds mentioned in the procedure, is provided in an appendix at the end of each preparation. Registry numbers, which are useful in computer searching and identification, are also provided in these appendixes. Whenever two names are concurrently in use and one name is the correct Chemical Abstracts name, that name is adopted. For example, both diethyl ether and ethyl ether are normally used. Since ethyl ether is the established Chemical Abstracts name for the 8lh Collective Index, it has been used in this volume The 9th Collective Index name is 1,1 -oxybisethane, which the Editors consider too cumbersome. 

Preparations are listed under the names which are used commonly for the compounds. For the convenience of those who wish to make a complete survey of the literature on any preparation, the Chemical Abstracts indexing name for each compound is given as a subtitle when that name differs from the title of the preparation. 

Iron pentacarbonyl and l-methoxy-l,4-cyclohexadiene react as shown by Birch and oo-workera, but in dibutyl ether this solvent has been found superior. The tricarbonyl(methoxy-l,3-cyclohexadiene)iron isomers undergo hydride abstraction with triphenylmethyl tetrafluoro-borate to form the dienyl salt mixture of which the 1-methoxy isomer is hydrolyzed by water to the cyclohexadienone complex. The 2-methoxy isomer can be recovered by precipitation as the hexafluoro-phosphate salt. By this method the 3-methyl-substituted dienone complex has also been prepared from l-methoxy-3-methylbenzene. The use of the conjugated 1-methoxy-1,3-cyclohexadiene in Part B led to no increase in yield or rate and resulted chiefly in another product of higher molecular weight. An alternative procedure for the dienone is to react tricarbonyl(l,4-dimethoxycyclohexadiene)iron with sulfuric acid. ... 

I n parations appear in the alphabetical order of common names (il (he compounds. For convenience in surveying the literature toiu erning any preparation through Chemical Abstracts subject Indexes, the Chemical Abstracts indexing name for each compound In given as a subtitle if it differs from the common name used as I he title. 

The Hiickel rule predicts aromaticity for the six-7c-electron cation derived from cycloheptatriene by hydride abstraction and antiaromaticity for the planar eight-rc-electron anion that would be formed by deprotonation. The cation is indeed very stable, with a P Cr+ of -1-4.7. ° Salts containing the cation can be isolated as a product of a variety of preparative procedures. On the other hand, the pK of cycloheptatriene has been estimated at 36. ° This value is similar to those of normal 1,4-dienes and does not indicate strong destabilization. Thus, the seven-membered eight-rc-electron anion is probably nonplanar. This would be similar to the situation in the nonplanar eight-rc-electron hydrocarbon, cyclooctatetraene. 

The best preparative results from autoxidation are encountered when only one relatively reactive hydrogen is available for abstraction. The oxidation of isopropylbenzene (cumene) is carried out on an industrial scale, with the ultimate products being acetone and phenol ... 

One of the older preparative free-radical reactions is the addition of polyhalomethanes to alkenes. Examples of addition of carbon tetrabromide, carbon tetrachloride, and bromoform have been recorded. The reactions are chain processes that depend on facile abstraction of halogen or hydrogen from the halomethane ... 

Abstracts of a series of papers by Goto et published in Japan in 1942-44, have become available recently in this country. They deal with the preparation of 7-hydroxycodeinone, 7-hydroxydihydrothebainol and the corresponding (+) derivatives from sinomenine, but chieily with the reactions of 1-bromosinomenine and its derivatives. 

Base-catalyzed proton abstraction from trimethylsulfoxonium halides (1) with formation of dimethylsufoxonium methylide (2) was described by Corey in 1962. Solutions of (2) in dimethyl sulfoxide are conveniently prepared from the chloride or iodide (1) by stirring with one equivalent of sodium hydride at room temperature. 

---