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本文通过高温固相反应得到标题所示的两个异核金属簇合物,两种晶体系异质同晶,空间群为C_v-Pma2;晶胞参数分别为(Ⅰ):a=7.955(1),b=6.258(1),c=7.203(2);(Ⅱ):a=7.914(1),b=6.237(1),c=7.236(1);Z=2。在簇单元Ni_2M_2T_(10)中,2个Ni和2个M原子成菱形排布,Ni—Ni和Ni—M之间存在金属—金属相互作用。每个金属原子周围最近邻的Te原子均按畸交四面体与金属原子配位,簇合物的结构式可写成[Ni_2M_2(μ_4-Te)_(6/3)(μ_4-Te)_(4/2)]_∞。簇单元之间通过簇间较弱的金属—金属键以及共有Te原子相互联结成平行于ab面的二维网状结构。晶体显示出较强的各向异性导电性。
In this paper, the two heteronuclear metal clusters indicated by the title are obtained by high-temperature solid-state reaction. The two crystal systems are heterogeneous and the space group is C_v-Pma2. The unit cell parameters are (Ⅰ): a = 7.955 ), b = 6.258 (1), c = 7.203 (2); (II): a = 7.914 (1), b = 6.237 (1), c = 7.236 (1); In the cluster unit Ni_2M_2T_ (10), two Ni and two M atoms are arranged in a diamond pattern, and there is a metal-metal interaction between Ni-Ni and Ni-M. The nearest neighbor Te atoms around each metal atom coordinate with the metal atom by the orthogonal tetrahedron. The formula of the cluster can be written as [Ni_2M_2 (μ_4-Te) _ (6/3) (μ_4-Te) _ (4) / 2)] _ ∞. Cluster units through the weaker clusters between the metal - metal bonds and the total Te atoms are linked into parallel to the ab plane of the two-dimensional network structure. Crystals show strong anisotropic conductivity.