As suspected based on gravimetry, the spectra of products 1-12 displayed additional narrow resonance(s) (C Q = 4.8-6. approaches the average value (1.987 Å) reported for anhydrous CUBE from the single-crystal X-ray diffraction measurements. As a result, the NMR spectroscopic parameters are progressively more influenced in the general direction of increasing δiso and |CQ|, consistent with the increasing dominance of the cation as a symmetry-breaking element and its deshielding effect.