(except the endo, endo isomer) and solvolyzed in 97% hexafluoroisopropanol. The rates and products are most easily interpreted in terms of classical ions. An approximate model of substituent effects allows an estimate of anchimeric assistance in the parent norbornyl ion to be a factor of about 540 at 25° and 18 at 125°.
合成了5-
氰基和6-
氰基-
2-降冰片基甲苯磺酸酯的所有可能的立体异构体(内,外异构体除外)并在97%
六氟异丙醇中溶剂化。速率和乘积最容易用经典离子来解释。取代基效应的近似模型可以估计母体降
冰片基离子中的嵌合助剂在25°时约为540,在125°时约为18。