Turning to molecular properties, a seminal study has demonstrated the loss of aromaticity in an annulene derivative. Experiments in conjunction with PBC and gas-phase DFT calculations have shown that pressure causes a gradual trapping of one of the resonance structures of the compound, which leads to a possible increase in reactivity. In another mixed experimental/computational study, the decrease in aromatic character in a nanohoop structure has been described as well. These studies highlight the connection between high-pressure chemistry and mechanochemistry, where aromatic character can be adjusted using stretching forces. When discussing the influence of pressure on molecular properties and bond lengths, bond angles etc.