Abstract
Two NQR lines were observed in 2,4-dichloroacetanilide at liquid-nitrogen and room temperatures. The Zeeman spectrum of both lines was investigated using a single crystal of the compound. Analysis of the zero-splitting loci show two non-equivalent directions for the electric field gradient principal axes for each of the lines. The observations are in agreement with the C 2 h symmetry for the crystal as reported by Groth. The c axis is inclined at an angle of 13° to the growth axis. The two CCl bonds in the molecule make an angle of 123° with one another. The crystal contains two sets of benzene rings with their planes inclined at angle of 24° to one another. The unit cell contains a minimum of 4 molecules. The ionic, single-bond, and double-bond character for both chlorines in all of the molecules are in the ratio 25:72:3.
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