4-diazepane, have been isolated and characterized. The complex cations of 1 and 4 possess, respectively, distorted octahedral and low-spin square planar coordination geometries in which nickel(II) is meridionally coordinated to all four nitrogen atoms of L1 and L4. DFT studies reveal that L5 with the ethylenediamine backbone coordinates in the cis-β mode in [Ni(L5)(CH3CN)2]2+5, but in the cis-α mode in [Ni(L5)(H2O)2]2+
一系列的Ni(II)的种类的配合物[
镍(L)(CH 3 CN)2 ](BPH 4)2 1 - 3,5和[
镍(L4)](BPH 4)2 4,其中L = N,N'-双(2-
吡啶-2-基甲基)-1,4-二氮杂pan(L1),N-(6-
甲基吡啶-2-基甲基)-N '-(
吡啶-2-基甲基)-1, 4- diazepane(
L2),N,N'-双(6-甲基-2-
吡啶基甲基)-1,4-diazepane(L3),N,N'-二甲基-N,N分离并鉴定了'-双(2-
吡啶基甲基)
乙二胺(L5),L4 = N,N'-双((1-甲基-1 H-
咪唑-2-基)甲基)-1,4-二氮杂characterized 。1和4的复杂阳离子分别具有扭曲的八面体和低旋方平面配位几何结构,其中
镍(II)经子午配位到L1和L4的所有四个氮原子。DFT研究表明,带有
乙二胺主链的L5在[Ni(L5)(CH 3 CN)2 ] 2+ 5中以顺式-β模式配位,而在[Ni(L5)(H