Cyclopropylcarbinyl cations can be studied by NMR : In the NMR spectrum of a dimethyl derivative , two nonequivalent signals are found for the two methyl groups , indicating that the molecular conformation of this cation not perpendicular ( as in A ) but is bisected ( as in B ) with the empty p-orbital and the cyclopropyl ring system in the same plane : In terms of bent bond theory , this preference is explained by assuming favorable orbital overlap between the filled cyclopropane bent bonds and the empty p-orbital .
Cyclopropylcarbinyl cations can be studied by NMR : In the NMR spectrum of a dimethyl derivative , two nonequivalent signals are found for the two methyl groups indicating that the molecular conformation of this cation not perpendicular ( as in A ) but is bisected ( as in B ) with the empty p-orbital and the cyclopropyl ring system in the same plane : In terms of bent bond theory , this preference is explained by assuming favorable orbital overlap between the filled cyclopropane bent bonds and the empty p-orbital .