Density-dependent 17O magnetic shielding in the gas phase

Abstract Density-dependent 17 O magnetic shielding has been measured for the first time. For pure CO, CO 2 , OCS and N 2 O gases at 300 K an increase in density linearly diminishes the oxygen shielding constants. It permits to separate quantitatively the shielding contributions due to intermolecular interactions ( σ 1 ) and the shielding parameters of isolated molecules ( σ 0 ). The new experimental results may be used for the better verification of ab initio calculations of oxygen shielding.

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