Multinuclear NMR spectroscopy of ethanol isotopic forms in the liquid and gas phase

Several ethanol isotopic species were dissolved in the buffer gases, Xe and SF 6 , and carefully investigated by NMR spectroscopy. The 1 H, 13 C and 17 O chemical shifts converted to magnetic shielding constants were obtained by extrapolation of the NMR parameters to the zero-density limit of the gaseous mixtures. These nuclear shielding constants are free from intermolecular interactions and can be directly compared with quantum calculation results. At the same time, the second virial coefficients of 1 H, 13 C and 17 O chemical shielding were obtained from the slopes of density dependences. High resolution NMR spectra were also recorded for neat samples to allow measurements of appro-apriate gas-to-liquid shifts. They reflect the association processes which take place during condensation from gas to the liquid state. Several spin-spin coupling constants in the ethanol molecule were mea-sured in the gas and liquid phase. The changes to the NMR parameters in different phases and isotopic compositions were given and briefly discussed