One-dimensional structures of manganese(II), copper(II) and cobalt(II) coordination complexes [MnII(hfac)2L] (hfac=hexafluoroacetylacetonate anion; L=4,4-bipyridyl), [CuII(hfac)2L] (L=1,3-dipyridylpropane or 4,4-bipyridyl-N,N′-dioxide) and [CoII(hfac)2L]

Treatment of bis(hexafluoroacetylacetonato)diaquamanganese(II) [Mn(hfac)2(H2O)2] with 4,4-bipyridyl gives cis-[MnII(hfac)2(bipy)] (1), which forms zig-zag 1-D chains. The bipyridyl ligands coordinate to the Mn cations adopting a cis geometry with an NMnN angle of 90°. Treatment of bis(hexafluoroacetylacetonato)diaquacopper(II) [Cu(hfac)2(H2O)2] with 1,3-dipyridylpropane gives trans-[CuII(hfac)2(1,3-dipy)] (2), which forms 1-D chains that adopt a trans NCuN angle of 180°. Treatment of [M(hfac)2(H2O)2] (M=Co or Cu) with 4,4-bipyridyl-N,N′-dioxide gives trans-[CoII(hfac)2(4,4-bipy-N,N′-dioxide)] (3) and trans-[CuII(hfac)2(4,4-bipy-N,N′-dioxide)] (4), respectively, which form isostructural linear chains with an OMO angle of 180°.