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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

Structure searching worksheet

  1. Type of structure search needed?
    • ___ Exact
    • ___ Family
    • ___ Closed Substructure (CSS)
    • ___ Substructure (SSS) (default)
  2. Want rings in answers to be fused to other ring systems, spiro-attached to other ring systems, or isolated from other ring systems?
    • Ring Fusion
    • ___ Isolated/Embedded (default)
    • ___ Isolated
  3. What values are desired for nodes?
    • Node Values
    • ___ Atom
    • ___ Shortcut
    • ___ System-defined variable
    • ___ Variable point of attachment
    • ___ G-group

    • Node Values — Specific vs. Generic
  4. Want atoms in structure to be part of a ring or a chain in answers?
    • Node Characteristics
    • ___ Ring (default for atoms in rings)
    • ___ Chain (default for atoms in chains)
    • ___ Ring/chain
  5. What values desired in structure?
    • Bond Values
    • ___ Single
    • ___ Single/Normalized
    • ___ Double
    • ___ Double/Normalized
    • ___ Triple
    • ___ Stereo
    • ___ Unspecified
  6. Want bonds in structure to be part of a ring or a chain in answers?
    • Bond Characteristics
    • ___ Ring (default for bonds in rings)
    • ___ Chain (default for bonds in chains)
    • ___ Ring/chain
  7. Want to block substitution at a position(s)?
    • ___ Draw in hydrogen atoms
    • ___ Do Exact or Family search
  8. Want to force substitution at a position(s)?
    • ___ Use system-defined variable groups
    • ___ Do CSS or SSS search
  9. Want to define substitution at a position(s)?
    • ___ Use G-groups
    • ___ Do SSS search


Last modified: June 22, 2005

   
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