Lists Chemical Abstracts

For more comprehensive lists, see the various lists of radicals given in the subject indexes of the annual and decennial indexes o/Chemical Abstracts. 

In 1990, Chemical Abstracts Service listed over 10 million substances in their Registry. Moreover, the growth of new compounds is exponential, lea ding to a doubling of known chemicals every eleven years. Thus there is an ever increasing need to efficiendy identify substances and quantitate material with high confidence. Hyphenated instmments, combinations of accepted instmmental techniques where the sample is passed from one instmment directiy into another, were developed to aid in solving this problem (1). 

Chemical Abstract Service Registry Number for a typical example of the sensitizer listed. See Figure 7 for some stmctural formulas. 

Scarcely a single issue of Chemical Abstracts is published without reference to medicinal compounds containing the pyrazine or quinoxaline ring in some form, and hence it is impractical to list all applications of pyrazines, quinoxalines and phenazines. Some of the more important applications and natural products, particularly the more recent developments, are mentioned in this Section. 

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. 

Enter the Chemical Abstracts Service (CAS) registry number in Section 1.2 exactly as it appears in Table II, pages 40-48, for the chemical being reported. CAS numbers are cross-referenced with an alphabetical list of chemical names in Table II of these instructions, tf you are reporting one of the chemical categories in Table II (e.g., copper compounds), enter not applicable, NA, In the CAS number space. 

Five different structures may be written for the oxazolones. Their skeletal formulas, the Chemical Abstracts nomenclature (listed first), and the names with more common usage follow. 

These joumels listed in alphabetical order of Chemical Abstracts abbreviations, which are indicated in boldface. Also given are the year of founding, number of issues per year as of 1998, and whether the journal primarily publishes papers (P), communications (C), or both. 

Once the complete title is known, the journal can easily be obtained if it is in the library customarily used by the chemist. If not, one must use another library, and the next step is to find out which libraries carry the journal. CASSI answers this question too, since it carries a list of some 360 libraries in the United States and other countries, and for each journal it tells which of these libraries carries it, and furthermore, if the holdings are incomplete, which volumes of that journal are carried by each library. It may be possible to visit the closest library personally. If not, a copy of the article can usually be obtained through interlibrary loan. The CASSI also includes lists of journal publishers, sales agents, and document depositories. Photocopies of most documents cited in CA can be obtained from chemical Abstracts Document Delivery Service, Customer Services, 2540 Olentangy River Road, Columbus OH, 43210, USA. Orders for documents can be placed by mail, telephone. Telex, fax, or online through STN or other services. 

Further steps toward universality are taken by the replacement of element and compound names wherever possible by symbols and formulas, and by adding to data in older units their recalculated SI equivalents. The usefulness of the reference sections has been increased by giving journal-title abbreviations according to the Chemical Abstracts Service Source Index, by listing in each reference all of its authors and by accompanying references to patents and journals that may be difficult to access by their Chemical... 

Part II consists entirely of systematic names of specific compounds according to Chemical Abstracts nomenclature (see the Index Guide in Chemical Abstracts, Volume 76, 1972). Each compound is listed under the parent name as it would appear in Chemical Abstracts, and each entry from Volumes 56 through 59 is followed by the registry number in brackets. Entries from Volumes 58 and 59 are, for the most part, taken from the appendices which follow the procedures. When the Chemical Abstracts name differs in Collective Indices 8 and 9, both names have been included. Some compounds in the appendices of this volume have been omitted from the index in accord with the guidelines given for Part I. 

Very little chemistry is known about the novichoks. However, from the possible synthesis listed in chemical abstracts for the compounds A-230, A-232, and A-234 we can infer what the novichok s may be. 

Compounds are identified by an IUPAC approved name [93-ano-l], the empirical molecular formula, and the Chemical Abstracts Service Registry Number. A summary table is available for each compound which includes the reported temperature and density values, an assigned uncertainty for the density, the difference between the observed and smoothed density values and an index key to the source of the data. A complete list of references, identified by the index keys, appears at the end of the volume. 

We soon found out that the material we had to deal with was much more extensive than we had anticipated. It was necessary to evaluate several thousands of papers dealing with azolide reactions in recent years. Chemical Abstracts lists more than 1500 references to CDI alone from 1967 to the present. Thus, what was originally planned as a progress review chapter in one of the existing series on organic reactions grew up into a real book, which we hope to be of value to organic chemists and biochemists interested in synthetic methods. 

Tropane alkaloids, long known to have anticholinergic, antiemetic, parasympatholytic, anesthetic, and many other actions, have been featured in an extremely wide number of pharmacological reports. The section Pharmacology in Chemical Abstracts (Vols. 90-105) lists over 600 articles. To deal in an adequate way with these articles would go far beyond the scope of the present chapter, and interested readers are referred to Chemical Abstracts. Many of the same articles are mentioned in Periodical Reports (9a-9h). Only a few papers (vide infra) will receive comment here. 

Some of the rigidly systematic names selected by the Association for Science Education for their nomenclature list in 1985 from the IUPAC possibilities, and some of the systematic indexing names used by Chemical Abstracts since 1972, are given as synonyms in the Index of Chemical Names (Appendix 4). This should assist those coming into industry and research with a command of those nomenclature systems but who may be unfamiliar with the current variety of names used for chemicals. The inclusion where possible of the CAS Registry Number for each title compound should now simplify the clarification of any chemical name or synonym problems, by reference to the Registry Handbook or other CAS source. 

Topics in Heterocyclic Chemistry presents critical accounts of heterocyclic compounds (cyclic compounds containing at least one heteroatom other than carbon in the ring) ranging from three members to supramolecules. More than 50% of billions of compounds listed in Chemical Abstracts are heterocyclic compounds. The branch of chemistry dealing with these heterocyclic compounds is called heterocyclic chemistry, which is the largest branch of chemistry and as such the chemical literature appearing every year as research papers and review articles is vast and can not be covered in a single volume. 

The American Chemical Society maintains the chemistry.org website at http // chemistry.org/portal/Chemistry. One can access Chemical Abstracts (CAS) from this site. The site lists meetings and publications and includes a careers and jobs site and an online store. American Chemical Society (ACS) publications at http // pubs.acs.org provides its members information products and services. Currently, over 30 magazines and peer-reviewed journals are published or co-published by the Publications Division. 

This is the Chemical Abstracts Service (CAS) Registry number. Chemical Abstracts, published by the American Chemical Society, is a listing of the abstract or summary written for any paper in the chemical literature. Every compound made gets a number. This makes for easy searching by computer, as well as by hand. 

The literature cited in this article covers references listed in chemical abstracts to the end of 1961 and in current chemical papers after that. A degree of selection has been exercised in omitting some references that are now of limited value. Although metal nitrosyls are included in the scope of this chapter, no kinetic data on their decomposition is available and they will not be considered further. The data on metal carbonyls is limited and will be dealt with in the first section. The decomposition of metal alkyls and aryls has been extensively investigated. These compounds will be discussed in groups based on the position of the central metal atom in the periodic table and, when warranted, a further subdivision will be made based on the attached organic radicals. 

The Chemical Abstracts Service maintains data on over 200,000 chemicals that are listed under national and international regulations. 

The index lists the names of compounds in two forms. The first is the name used commonly in procedures. The second is the systematic name according to Chemical Abstracts nomenclature. Both are usually accompanied by registry numbers in parentheses. Also included are general terms for classes of compounds, types of reactions, special apparatus, and unfamiliar methods. 

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