Recognizing Organic Fragments

This is a drill and practice exercise in recognizing the basic propyl,butyl and pentyl radicals. When you press "New Strucure" a new window with a structure and 8 possible fragment names will appear. The first time the window appears, it may obscure part of the scoring table. If so, simply drag the window to an open area. It will remain in the new position for the remainder of the session. Click on the circle in front of the proper fragment. The results will appear in the table on the main page. If you get an incorrect answer, you should retry the same compound.
Results Total Done Total Correct