(1,4-dioxane-O)(3,3 ',5,5 '-tetrachloro-2,2 '-[4-methyl-4-azaheptane-1,7-diyl-bis(nitrilomethylidyne-N)] diphenolato-O,O ')nickel(II), [Ni(3,5-Cl(4)salMetrien)]

In the title compound, [Ni(C21H21Cl4N3O2)(C4H8O2)], the Ni atom has a disto rted octahedral coordination geometry in which the pentadentate Schiff base ligand acts as an N3O2 donor and a molecule of 1,4-dioxane occupies the re maining coordination position. The N atoms adopt a meridional arrangement, coplanar with the O-donor atom of the dioxane molecule, and the ligand O at oms are trans-related. This conformation results in an approximate square-p yramidal coordination for the pentadentate ligand, with the dioxane molecul e trans to the amine N atom.