论文部分内容阅读
在无氧无水和纯净氮气保护下,以FeCl_2,(NH_4)_2WS_4,NaS_2CN(C_2H_5)_2和(C_2H_5)_4NBr为原料,合成出了簇合物[(C_2H_5)_4N]_2{Fe_4S_4[S_2CN(C_2H_5)_2]_4}。其晶体属单斜晶系,Cc空间群,a=22.125(6),b=11.313(3),c=25.053(8);β=118.05(2),V=5534.2,Z=4。它具有类立方烷型核心Fe_4S_4,每个Fe原子上都有一个双硫螯合配位体S_2CN(C_2H_5)_2。Mssbauer谱、X光电子能谱及量子化学计算结果都表明,簇合物中含有两种数量相等而价态不同的Fe。提出了该簇合物生成反应的图解,报道了簇合物的红外光谱、紫外-可见光谱及氧化还原性质。
(C_2H_5) _4N] _2 {Fe_4S_4 [S_2CN (superscript 2 +)] _4N (subscript n) was synthesized from FeCl_2, (NH_4) _2WS_4, NaS_2CN (C_2H_5) _2 and C_2H_5) _2] _4}. The crystals are monoclinic with Cc space group a = 22.125 (6), b = 11.313 (3), c = 25.053 (8); β = 118.05 (2), V = 5534.2, Z = 4. It has a cubic-type core Fe_4S_4, each Fe atom has a double-sulfur chelate ligand S_2CN (C_2H_5) _2. Mssbauer spectra, X-ray photoelectron spectroscopy and quantum chemistry calculations show that the cluster contains two equal and different valences of Fe. A graphic representation of the cluster formation reaction was presented. The infrared spectra, UV-Vis spectra and redox properties of the clusters were reported.