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    The Influence of Intermolecular Interactions on Nuclear Magnetic Resonance Chemical Shift Measurements as Related to Certain High Molecular Weight Hydrocarbon Systems

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    Nuclear magnetic resonance high resolution measurements of certain light hydrocarbon systems are described which illustrate the dependence of chemical shift on intermolecular interactions. Investigations of interaction phenomena are extended to a quantitative study of pure hydrocarbons in the petroleum oil range. Concentration dependent chemical shift deviation values as large as 27 sec−1 at a Larmor frequency of 40 Mc per sec are observed in n-hexadecane-diphenylmethane mixtures. The implication of these concentration dependent shifts on structural characterization of petroleum oils by reference standards is discussed.

    Author Information:

    Zimmerman, J. R.
    Magnolia Petroleum Co., Dallas, Tex.

    Lasater, J. A.
    Magnolia Petroleum Co., Dallas, Tex.

    Committee/Subcommittee: D02.04

    DOI: 10.1520/STP46926S