摘要:
The title compounds, bis(dimethylformamide)-1kappaO,3kappaO-bis{mu-2,2'-[2,2'-dimethylpropane-1,3-diylbis(nitrilomethylidyne)]diphenolato}-1kappa(4)N,N',O,O':2kappa(2)O,O';2kappa(2)O,O':3kappa(4)N,N',O,O'-di-mu-nitrito-1:2kappa(2) N:O;2:3kappa(2)O: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. The three complexes are isostructural. There are three bridges across the Ni-M atom pairs (M is Co2+, Cu2+ or Mn2+) in each complex, involving two O atoms of a mu-N,N'-bis(salicylidene)-2,2' dimethyl-1,3-propanediaminate ligand and an N-O moiety of a mu-nitrito group. The coordination sphere around each metal atom, whether Co2+, Cu2+, Mn2+ or Ni2+, can be described as distorted octahedral. The Ni...M distances are 2.9988 (5) Angstrom in (I), 2.9872 (5) Angstrom in (II) and 3.0624 (8) Angstrom in (III).