新型Mo-Pb-S异四核簇合物[Mo_3(PbI_3)S_4(dtp)_3(C_3H_4N_2)_3][(CH_3)_2CO]_2的合成和晶体结构

Synthesis and Crystal Structure of [Mo_3(PbI_3)S_4(dtp)_3(C_3H_4N_2)_3]-[(CH_3)_2CO]_2 A New Mo-Pb-S Heterotetranuclear Cluster

由[Mo_3(μ_3-O)(μ-S)_3(dtp)_4(H_2O)]和PbI_3^-在咪唑存在下反应获得异四核混合簇[Mo_3-(PbI_3)S_4(dtp)_3(C_3H_4N_2)_3][(CH_3)CO]_2(2)[dtp=S_2P(OC_2H_5)_2^-].簇合物属斜方晶系,空间群P_(bca)(No.61),晶胞参数为α=2.3590(3),b=1.9161(5),c=2.6458(9)nm,V=11.959(6)nm^3,Z=8.结构最终偏离因子R=0.067.此四核簇分子具有[Mo_3PbS_4]类立方烷簇芯,簇分子整体对称性接近C_(3v).在同一不对称单元中,簇分子的咪唑环以(NH)和溶剂丙酮分子的氧原子形成O—H—N氢键.

A new heterotetranuclear cluster compound [Mo3(PbI3)S4(dtp)3(C3H4N2)3]-[(CH3)2CO]2(2) was prepared by the reaction of [Mo3OS3(dtp)4(H2O)] with PbI3- in the presence of imidazole (C3H4N2). The cluster structure consists of the neutral Mo-Pb tetranuclear cluster with a cubane - like [ Mo3PbS4 ] core and the solvent acetone (CH3)2CO. There are hydrogen bonds O - H-N between the oxygen atom of the acetone and the (NH) of the imidazol ring of the Mo-Pb cluster. Crystallographic data : Orthorhombic Pbca ( No. 61) . a = 2.3590(3),b= 1.9161(5),c = 2.6458(9)nm,V = 11.959(6)nm3,Z = 8.Final R =0.067.