Proton Magnetic Resonance Study of the Structure of Barium Chloride Dihydrate

Abstract

The proton magnetic resonance absorption spectrum of barium chloride dihydrate has been obtained experimentally at room temperature using a Pound‐Watkins spectrometer. The results indicate that there are four pairs of p—p directions in the crystal. The p—p distance and direction angles of these four pairs are: 1.58 A, α₀=90°, β₀=58°, γ₀=148°; 1.58 A, α₀=90°, β₀=58°, γ₀=32°; 1.59A, α₀=148°, β₀=58°, γ₀=90°; 1.57 A, α₀=32°, β₀=58°, γ₀=90°. The experimental error for the p—p distance is ±0.02 A and for the direction angles it is ±4°. By using experimental data, x‐ray analysis, and the concept of hydrogen bonding the positions of the hydrogen atoms were determined.