[aram2189]

Today my professor discussed carbon radical reactions and showed us an example where you could either have 6-exo-trig or 7-endo-trig. According to Baldwin Rules both reactions would be favorable howver 6-exo-trig occurs because although the process of 7-endo-trig would generate a secondary radical which is more stable than the primary radical formed by 6-exo-trig, the stability of the secondary radical is not enough to overcome the inherent kinetic reference of making a 6 over a 7 membered ring.  Can anyone clarify the order of ring formation by carbon-centered radical reactions?

So far for cyclization kinetics I have: 5>6>7>3>4, can anyone confirm this?

[spirochete]

People are not going to spend that much of their charitable time deciphering a block of text. Give us a picture. If you don't know how to give us a picture, then look it up.