Abstract
Cesium-133 NMR spectra of a single crystal of tetragonal <TEX>$Cs^+ (15-crown-5)_2I^-$</TEX> were obtained as a function of crystal orientation in an applied magnetic field of 9.40T and analyzed to provide the magnitudes and orientations of the <TEX>$^{133}Cs$</TEX> chemical shift and quadrupolar tensors for two magnetically nonequivalent and symmetry related sites. Chemical shift tensor components and parameters of quadrupolar interactions are obtained as <TEX>${\delta}_{11}=46(1),\;{\delta}_{22}=60(1),\;{\delta}_{33}=-30(1)$</TEX> ppm, quadrupole coupling constant QCC = 581(1) kHz, and asymmetry parameter <TEX>${\eta}$</TEX> = 0.481(1), respectively. The nonaxially symmetric NMR parameters imply that the local environment of the cesium nuclei is nonaxially symmetric. The DANTE experiment burned holes in the <TEX>$^{133}Cs$</TEX> NMR line of the title compound. The hole burning of the single crystal and powder <TEX>$^{133}Cs$</TEX> NMR lines showed that the NMR lines are not homogeneously broadened.
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