Structural Chemistry of Polyanion Clusters of p-Block Elements

p 区元素聚阴离子簇的结构化学

• 批准号: 09640676
• 负责人: TAKAHASHI Masashi
• 金额: $ 1.86万
• 依托单位: Toho University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09640676/
• 关键词: Intermetallic Compound; Zintl Compound; Mossbauer Spectroscopy; Mossbaueer Spectra; テルル化アンチモン; Zintl相; Intermetallic Compound; Zintl Compound; Mossbauer Spectroscopy; Mossbaueer Spectra; テルル化アンチモン; Zintl相

This research have been done to obtain and promote the knowledge on the structure and bond in the Zintl compounds, the intermetallic compounds between the alkali or alkaline earth metals and posttransition elements, and the related compounds such as Zintl anions by means of Mossbauer spectroscopy. To perform this purpose, several attempts have been carried out ; the preparation of Zintl compound and synthesis of Zintl anion by a electrochemical method were carried out.After the many reviews of the reaction condition, the Zintl compounds have been prepared by the crystallization from the melt containing the stoichiometric amount of the alkali metal and antimony in an aluminum crucible under the nitrogen atmosphere. The binary compound K_3Sb, KSb, KSb_2, Na_3Sb, NaSb and Mg_3Sb_2 were prepared by this method. The binary intermetallic compound between antimony and the transition elements were prepared by the crystallization from the melt in a evacuated quartz tube. The attempt to prepare the Zintl anion by electrochemical method has been failed in spite of much effort.The ^<121>Sb Mossbauer spectra for the intermetallic compounds have been measured at 20K.The spectra for the compounds of M-Sb system (M = Na, K) shows that M_3Sb and Mg_3Sb_2 are an ionic compounds consist of the M^+ and Sb^<3-> ions, the same electron configuration as that of Xe. For MSb and KSb_2, on the other hand, much covalent interactions between antimony atoms are suggested and the excess electrons are mainly held in the Sb 5p orbitals. The order of the number of the accepted electrons are increased in the order MSb_2 <MSb <M_3Sb, indicating the ionic character of these compounds. The Mossbauer spectra for Cu_3Sb, Cu_2Sb, Ag_3Sb, AuSb_2, and ZnSb suggest the covalent nature for these compounds.

这项研究是为了获得和促进ZINTL化合物中的结构和键的知识，碱性或碱接地金属和过渡后元素之间的金属间化合物，以及通过Mossbauer Spectroscopopy的方式，例如ZINTL阴离子等相关化合物。为了执行此目的，已经进行了几次尝试。进行了ZINTL化合物和通过电化学方法的Zintl阴离子的合成。在对反应条件的许多评论中，ZINTL化合物通过熔体的结晶制备，其中包含含有碱金属和抗氧化的含量含量的含量含量的含量。通过这种方法制备了二进制化合物K_3SB，KSB，KSB_2，Na_3SB，NASB和MG_3SB_2。锑和过渡元件之间的二元金属间化合物是通过从疏散的石英管中的熔体结晶制备的。尽管努力付出了很多努力，但通过电化学方法制备Zintl阴离子的尝试还是在20K处测量了金属间化合物的^<121> sb Mossbauer谱。离子，与Xe相同的电子构型。另一方面，对于MSB和KSB_2，提出了许多锑原子之间的共价相互作用，并且多余的电子主要保存在SB 5p轨道中。接受的电子数量的顺序以MSB_2 <msb <m_3sb的顺序增加，表明这些化合物的离子特征。 CU_3SB，CU_2SB，AG_3SB，AUSB_2和ZNSB的Mossbauer光谱提出了这些化合物的共价性质。