Deuteron Nuclear Magnetic Resonance in Anthracene Crystals

Abstract

The room‐temperature electric quadrupole coupling constants |eQΦ_zz/h| and asymmetry factors η=(Φ_xx—Φ_yy)/Φ_zz for deuterons in single‐crystal anthracene‐d₁₀, have been determined. For all deuteron sites |eQΦ_zz/h| falls in the range 181±3 kc/sec, and η=0.064±0.013. |Φ_zz| > |Φ_yy| > |Φ_xx| are elements of the diagonalized electric‐field‐gradient tensors at the deuteron sites, with Q the deuteron electric quadrupole moment. Within experimental error, at each site Φ_zz is along the geometrical C—D bond, and Φ_yy is normal to the molecule plane.