In an article dedicated to the structure and energetics of the adduct Ag+/[6]helicene (Chem. Phys. Letters 633 (2015) 105-108), the authors measured an energy threshold for the dissociation into Ag and ([6]helicene)(+), using collision induced dissociation in an ion trap mass spectrometer. The result is incorrectly interpreted in term of a bond dissociation energy (BDE) related to the formation of Ag+ and neutral [6]helicene. In this Comment, the initial experimental result is converted into the true BDE using ionization energies of Ag and [6]helicene. The experimental method, accuracy and significance of this BDE in term of cation/pi interaction, are discussed. (C) 2017 Elsevier B.V. All rights reserved.