Table . Overview of the experimental and DFT-calculated O NMR parameters for the various diaminefunctionalised frameworks adsorbing CO 2 to form carbamate chains. The DFT structures used for the different compounds correspond to those in Figure . We estimate that the experimental errors are ± 1 ppm, ± 0.2 MHz, and ± 0.1, for δ 17 O, C Q , and η Q , respectively.