Six new homoleptic complexes of the general form [Ni(L2)] [L = L1 (9-fluorenylmethyl)xanthate (1); L2 (cyclobutylmethyl)xanthate (2); L3 (1-benzyl-4-hydroxypiperidine)xanthate (3); L4 (N-benzyl-N-methylpyridyl)dithiocarbamate (4); L5 (N-methylfuryl-N-methylpyridyl)dithiocarbamate (5); L6 (N-benzyl-N-methylfuryl)dithiocarbamate (6)] have been prepared and characterized by microanalysis, spectroscopy (IR, 1H and 13C NMR, UV-Vis) and their structures have been elucidated by X-ray crystallography. In all complexes the metals are four coordinate with square planar coordination geometries although in the crystal structures of 2 and 4 significant CâHâ¯Ni anagostic intermolecular interactions in axial positions are found which involve the metal atom in chain motifs. As far as we are aware 2 and 4 are unique examples of homoleptic metal dithio complexes exhibiting such type of anagostic interactions. In the remaining complexes (1, 3, 5 and 6) supramolecular frameworks are stabilised by Sâ¯S, CâHâ¯S, CâHâ¯Ï and Ïâ¯Ï non-covalent interactions. All six complexes are weakly conducting (Ïrt = 10â11â10â8 S cmâ1; Ea = 0.37â1.40 eV) and show semiconductor behaviour in the 303â393 K temperature range.
六种新型同核配合物,其通式为[Ni(
L2)] [L = L1 (9-
芴基甲基)黄原酸盐(1);
L2 (
环丁基甲基)黄原酸盐(2); L3 (
1-苄基-4-羟基哌啶)黄原酸盐(3); L4 (N-苄基-N-
甲基吡啶基)二
硫代
氨基甲酸盐(4); L5 (N-甲基
呋喃基-N-
甲基吡啶基)二
硫代
氨基甲酸盐(5); L6 (N-苄基-N-甲基
呋喃基)二
硫代
氨基甲酸盐(6)],已经制备并通过微分析、光谱学(IR、1H和13C NMR、UV-Vis)进行表征,其结构已通过X射线晶体学阐明。在所有配合物中,
金属均为四配位,具有平面四方形配位几何结构,尽管在2和4的晶体结构中发现了轴向位置上的显著CâHâ¯Ni错位分子间相互作用,这些相互作用涉及
金属原子在链状结构中。据我们所知,2和4是同核
金属二
硫配合物中唯一表现出此类错位相互作用的例子。在其余配合物(1、3、5和6)中,超分子框架通过Sâ¯S、CâHâ¯S、CâHâ¯Ï和Ïâ¯Ï非共价相互作用稳定。所有六种配合物均具有弱导电性(Ïrt = 10^(-11)至10^(-8) S cm^(-1); Ea = 0.37至1.40 eV),并在303至393 K温度范围内表现出半导体行为。