Complex sentence: X-ray analysis shows D 6h molecular symmetry, the aromatic planes are separated by 262 pm, proton NMR shows just one peak at 2,98 ppm and carbon NMR two at 32 ppm and 144 ppm.
Split into simpler sentences: X-ray analysis shows D 6h molecular symmetry with the aromatic planes separated by 262 pm. Proton NMR shows just one peak at 2,98 ppm and carbon NMR two at 32 ppm and 144 ppm.