The SciFinder structure/reaction editor can be slow (at least a minute) to load in your web browser, especially the first time you open it during that session. You may also be promted to accept a certificate or ActiveX plug-in. More about browser requirements here.
A Java plug-in is also required for the editor. Most likely, this is already installed.
There are several common reasons why you may have problems connecting to SciFinder:
If you still have problems connecting to SciFinder, please contact Amy Prendergast. Sometimes this involves network or firewall issues, and you may need to work with your IT people to resolve these.