The square-planar nickel(II) complexes [NiPh2PC(S)NPh}2] and [NiPh2P(Y)C(S)NPh}2](Y = S or Se) have been prepared and characterised spectroscopically. Their structures have been confirmed by single-crystal X-ray diffraction methods. In [NiPh2PC(S)NPh}2] the Ni atom is chelated by the thioamide S atoms [2.188(2), 2.163(2)Å] and phosphine P atoms [2.171(2), 2.182(2)Å] which define a trans-S2P2 donor set. In [NiPh2P(S)C(S)NPh}2] the centrosymmetric structure features S,S chelating ligands with the Ni–S (thioamide) distance of 2.184(2)Å being equivalent to the Ni–S (sulfide) distance of 2.197(2)Å in the S4 donor set. In [NiPh2P(Se)C(S)NPh}2] the Ni atom in the centrosymmetric structure exists in a square-planar S2Se2 donor set with Ni–S 2.202(3)Å and Ni–Se 2.344(1)Å.
我们制备了方形平面
镍(II)配合物 [NiPh2PC(S)NPh}2] 和 [NiPh2P(Y)C(S)NPh}2](Y = S 或 Se),并对它们进行了光谱学表征。它们的结构已通过单晶 X 射线衍射方法得到证实。在[NiPh2PC(S)NPh}2]中,
镍原子被
硫代酰胺 S 原子[2.188(2), 2.163(2)埃]和膦 P 原子[2.171(2), 2.182(2)埃]螯合,从而形成了反式-S2P2 给体集合。在[NiPh2P(S)C(S)NPh}2]中,中心对称结构具有 S,S 螯合
配体,Ni-S(
硫酰胺)距离为 2.184(2)埃,相当于 S4 给体组中 Ni-S(
硫化物)距离为 2.197(2)埃。在[NiPh2P(Se)C(S)NPh}2]中,中心对称结构中的
镍原子存在于方形平面的 S2Se2 给体组中,Ni-S 距为 2.202(3)埃,Ni-Se 距为 2.344(1)埃。