(Naphthalene-2,3-diolato-κ2O,O′)[tris(pyridin-2-ylmethyl)amine-κ4N]cobalt(III) tetraphenylborate acetone monosolvate hemihydrate

In the title salt, [Co(C10H6O2)(C18H18N4)](C24H20B)·C3H6O·0.5H2O, the CoIII ion in the complex cation is six-coordinated in a rigid octahedral N4O2 geometry. The asymmetric unit contains one complete [Co(C10H6O2)(C18H18N4)]+ unit, one tetraphenylborate counter-anion and one acetone and one water molecule that is located on an inversion centre. All the features of the CoIII ion are fully consistent with the formulation of the cation as a Co3+–catecholate complex. Variable-temperature magnetic measurements in the region 2–380 K show a obvious diamagnetism over the observed temperature range