skip to page content | skip to main navigation
STN Express Workshop: Types of Structure Searches, from Swain Library.  SOCRATES  E-JOURNALS  SITE SEARCH  ASK US  TEXT ONLY SULAIR HOME  SU HOME
 Catalog and Search Tools  Research Help   Libraries and Collections  Services  How To ...  About SULAIR
SWAIN CHEMISTRY AND CHEMICAL ENGINEERING LIBRARY
Printer-Friendly Printer-Friendly

Databases for Chemists and Chemical Engineers

Chemical Abstracts

SciFinder Scholar | CAS Online | Standard Abbreviations | Index Guide | Guide to CASREACT | Structure Searching with STN Express

Structure searching in CAS Online using STN Express: An introductory workshop

Types of structure searches

Type of Substance Retrieved Exact Family Sub-structure (SSS)
Structure with no additional substitution X X X
Radiolabeled forms of the substance X X X
Steroisomers X X X
Homopolymers X X X
Free radicals X X X
Charged compounds X X X
Salts and mixtures X X
Addition compounds X X
Copolymers X X
Structures with additional substitution X

A fourth type of structure search is also available.

Closed substructure searches (CSS)

  • Substance search which matches exactly a query and which contains system-defined variables.
  • No further substitution is allowed except where specified.


Last modified: June 22, 2005

   
seal © Stanford University. Stanford, CA 94305. (650) 723-2300. Terms of Use | Copyright Complaints
[an error occurred while processing this directive]