Dicyclopropylcarbinyl cation

It shows l3C absorptions (-135 °C) at <5I3C 234.18 (C+), 21.21 (C2), 38.15 (C3, C4), 51.67 (C5), 43.9 (C6, C7). Compared to dicyclopropylcarbinyl cation, the l3C signal for the cationic center is shielded by 20 ppm, indicating cyclopropyl group participation in the stabilization of the cation. The chemical shifts were compared with the values obtained from GIAO-SCF and GIAO-MP2 methods. 

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