Equilibrium of Low- and High-Spin States of Ni(II) Complexes Controlled by the Donor Ability of the Bidentate Ligands
作者:Hideki Ohtsu、Koji Tanaka
DOI:10.1021/ic035486+
日期:2004.5.1
In addition, the corresponding high-spin nickel(II) complexes having a nitrate ion, [Ni(Py(Bz)2)(tBuacac)(NO3)] (3) and [Ni(MePy(Bz)2)(tBuacac)(NO3)] (4), have also been synthesized for comparison. Complexes 1 and 2 have tetracoordinate low-spin square-planar structures, whereas the coordination environment of the nickel ion in 4 is a hexacoordinate high-spin octahedral geometry. The absorption spectra
低旋转镍(II)配合物,包含具有可调氮供体能力的Pent(Bz)2或MePy(Bz)2(Py(Bz)2 = N,N-双(苄基)-N-[(2-吡啶基)甲基]胺MePy(Bz)2 = N,N-双(苄基)-N-[(6-甲基-2-吡啶基)甲基]胺)和β-二酮酸酯衍生物tBuacacH(tBuacacH = 2 ,[2,6,6-四甲基-3,5-庚二酮],表示为[Ni(Py(Bz)2)(tBuacac)](PF6)(1)和[Ni(MePy(Bz)2)(tBuacac) ](PF6)(2)已经合成。此外,相应的具有硝酸根离子的高旋转镍(II)配合物[Ni(Py(Bz)2)(tBuacac)(NO3)](3)和[Ni(MePy(Bz)2)(tBuacac) (NO3)](4),也已经合成以作比较。配合物1和2具有四配位低自旋方平面结构,而镍离子在4中的配位环境为六配位高自旋八面体几何。低配位化合物1和2在