Computed excitation energies and oscillator strengths of vertical electronic transitions of Ada + and Ada-CN + were reported in the literature. Besides vertical excitations, vibrationally resolved absorption and photoelectron spectra of Ada + and Ada, respectively, were also calculated. For Ada-CN + , Crandall et al. calculated a vibrationally-resolved spectrum for a selected band (D 0 → D 11 ). We note that the absence of vibrationally resolved spectra for other bands is caused by unsuccessful excited-state optimizations of cationic diamondoinds when using time-dependent density functional theory . Recently, we have also simulated adiabatic and nonadiabatic dynamics of Ada + , providing insight into (ultra)fast electronic relaxation and fragmentation of the cation.