Compounds with symmetrical tricobalt chains wrapped by dipyridylamide ligands and cyanide or isothiocyanate ions as terminal ligands

The preparation and characterization of the three new linear compounds of the type Co3(dpa)(sub 4)X(sub 2) in which X = NCS-, CN- and N(CN)(sub 2)(super -) are reported. For all the compounds, the magnetic behavior is quite similar and as the temperature increases, the effective moments increase gradually, but since saturation is not reached, even at 400 K, the high-spin state cannot be assigned.