| Autor: |
Schultz, J L1 (AUTHOR), Wilks, E S (AUTHOR) |
| Předmět: |
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| Zdroj: |
Journal of Chemical Information & Computer Sciences. Sep-Oct1996, Vol. 36 Issue 5, p967-972. 6p. |
| Abstrakt: |
SCION is a DuPont proprietary database that operates by use of Chemical Abstracts Service's Registry System (CASRS) for substance registration and Messenger software for searching. The CASRS cannot register structural repeating unit (SRU) (i.e., structure-based) polymers with odd numbers of crossing bonds (bonds that cross limiting parentheses or brackets). This paper describes the intellectual conversion of SRUs with an odd number of crossing bonds into hyperbranched, 'I'-shaped SRUs with an even number of crossing bonds, so that they can be registered by the CASRS. A new nomenclature system is described for these new SRUs. This paper also includes conversion of other SRUs with even or odd numbers of crossing bonds but incorrect atom ratios, e.g., silsesquioxanes and poly-1,1,2,2-ethanediylidenetetraoxy. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Library, Information Science & Technology Abstracts |
| Externí odkaz: |
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