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Singlecrystal Xray diffraction and C solid state NMR spectroscopy were used to characterize the structure and dynamics of the pxylene clathrate of Dianin's compoundC O R Cl saturated = 1800 conjugated = 1770 aromatic = 1770 C O R O O R R' H R N O O nitro asymmetric = symmetric = Very often there is a very weak C=O overtone at approximately 2 x ν (≈3400 cm1) Sometimes this is mistaken for an OH or NH peak, sp2 CH bend patterns for alkenes sp2 CH bend patterns for aromaticsEach isomer of xylene produces a slightly different 1H NMR spectrum The highly symmetric p xylene produces two signals, one aliphatic signal due to the substituent methyl protons, and a second aromatic proton signal The lower symmetry o xylene and p xylene molecules produce complex aromatic signals that overlap and are indistinguishable Pubs Acs Org Doi Pdf 10 1021 Acs Oprd 5b P-xylene c nmr