Zeeman effect of nuclear quadrupole resonance in 1hyphen;chlorohyphen;2,4hyphen;dinitrobenzene

摘要

The Zeeman effect of NQR was studied in 1hyphen;chlorohyphen;2,4hyphen;dinitrobenzene. A low value of the asymmetry parameter (0.10) was obtained. Four physically inequivalent field gradients were located and their orientations in the crystallographic abc system were determined using symmetry considerations. From these data the orientations of the molecules in the unit cell were determined. The results agree well with the twohyphen;dimensional xhyphen;ray structural data. The bond characters of theCsngbnd;Clbond were calculated, and the values compare well with those generally obtained forCsngbnd;Clbonds in chlorine derivatives of benzene.