Structure searching in CAS Online using STN Express:
An introductory workshop
Building structures: Drawing the carbon skeleton
- Use Template (menu bar choice)
- Use Pencil tool
- Macintosh version: When the pencil is positioned on an atom, the body of the pencil is black. When the pencil is on a bond, the eraser of the pencil is black.
- Windows version: When the pencil is positioned on an atom, the letter “A” appears in the pencil. When it is positioned on a bond, a line appears in the pencil.
- Use Chain tool
- Use Ring tool
| To Specify | Enter | Examples |
|---|---|---|
| Size of Ring | Number to specify ring size | 6 |
| Fused Rings | Enter size of ring. Specify direction of fusion by entering U for Up and D for Down | 66 66U6 |
| Alternating Bonds | Mac version: hold down Apple Key when positioning the ring |
Tip: To eliminate the possibility of inadvertently superimposing two nodes on top of one another, choose Display in the menu bar and choose the Dot Atoms display format.