Anti-electrostatic cation⋯π-hole and cation⋯lp-hole interactions are stabilized via collective interactions.

Collective interactions are a novel type of bond between metals and AX 3 fragments with an electropositive central atom, A, and electronegative X substituents. Here, using electrostatic potential maps and state-of-the-art bonding analysis tools we have shown that collective interactions are anti-electrostatic cation⋯π-Hole or cation⋯lp-Hole interactions.