We have observed cobalt. 59 NMR on tetrahedric clusters in solution and in
the solid stale. From the relaxation times in solution, we are able to dedu
ce the quadrupolar coupling constants for Ru-99 and to simulate the Co-59 s
pectrum in the solid state for the basal atoms of Co-4(CO)(12) which has ne
ver been observed. This short review shows the interest of high fields appl
ied to quadrupolar nuclei.