Three heterotrinuclear Schiff base complexes of nickel(II) with cobalt(II), copper(II) and manganese(II)

摘要: The title compounds, bis­(di­methyl­form­amide)-1κO,3κO-bis{μ-2,2′-[2,2′-di­methyl­propane-1,3-diyl­bis­(nitrilo­methylidyne)]­diphenolato}-1κ4N,N′,O,O′:2κ2O,O′;2κ2O,O′:3κ4N,N′,O,O′-di-μ-nitrito-1:2κ2N:O;2:3κ2O:N-dinickel(II)­cobalt(II), [CoNi2(NO2)2(C19H22N2O2)2(C3H7NO)2], (I), -copper(II), [CuNi2(NO2)2(C19H22N2O2)2(C3H7NO)2], (II), and -manganese(II), [MnNi2(NO2)2(C19H22N2O2)2(C3H7NO)2], (III), consist of centrosymmetric linear heterotrinuclear metal complexes. three complexes are isostructural. There bridges across the Ni–M atom pairs (M is Co2+, Cu2+ or Mn2+) in each complex, involving two O atoms a μ-N,N′-bis­(salicyl­idene)-2,2′di­methyl-1,3-propane­diaminate ligand an N—O moiety μ-nitrito group. coordination sphere around atom, whether Cu2+, Mn2+ Ni2+, can be described as distorted octahedral. Ni⋯M distances 2.9988 (5) A 2.9872 (5) A (II) 3.0624 (8) A (III).