Studies on Inorganic and Organometallic Chaloogenides

拟议的研究涉及金属与硫、硒和碲元素之间化合物的形成，这些元素在历史上被称为硫族元素。这一研究项目已经合成了大量有趣的新化合物。其中一些化合物与用于净化石油原料的加氢脱硫催化剂有关，这项研究有望使人们更好地了解这些催化剂的作用，并为设计更好的催化剂提供必要的知识。这项建议涉及含有无机硫配体的分子络合物的合成/反应性研究，即由S、Se或Te的1-6个原子组成的配体。尽管它们很简单(实际上可能正因为如此)，这些配体是多功能的反应中心。该项目分为三个部分。第一个计划是制造新的无机硫系阴离子Ru，Rh，Nb，Ta，和稀土/榄系元素。这里的方法是利用成盐反应开发新的化合物类别，典型的做法是用无机硫族阴离子取代四羧酸盐双金属化合物中的羧酸盐。下一节涉及环戊二烯基金属硫化物作为合成中间体和催化剂模型。重点讨论了Cp*2Ru2S4反应的机理。这项工作的扩展包括Cp*2Cr2O4化学、团簇建立反应和电子物理M=S官能团。结束语部分重点介绍了噻吩类简单金属络合物，特别是它们与金属硫化物反应活性的关系。

The proposed research concerns the formation of compounds between metals and the elements sulfur, selenium and tellurium, which are members of a group historically known as the chalcogens. This research project has already resulted in the synthesis of a large number of interesting new compounds. Some of the compounds are related to the hydrodesulfurization catalysts which are used for cleaning up petroleum feedstocks, and the research is expected both to lead to a better understanding of the action of these catalysts and to provide knowledge necessary for the design of better catalysts. This proposal concerns synthetic/reactivity studies on molecular complexes containing inorganic chalcogen ligands, i.e. ligands consisting of 1-6 atoms of S, Se or Te. Despite their simplicity (indeed possibly because of it) these ligands are versatile reactivity centers. The project is broken down into three sections. First plans are described making new inorganic chalcogenide anions of Ru, Rh, Nb, Ta, and rare earth/actinide elements. The approach here is to develop new classes of compounds using salt-forming reactions, typified by displacement of carboxylates in tetracarboxylatedimetal compounds by inorganic chalcogen anions. The next section concerns cyclopentadienyl metal sulfides as synthetic intermediates and catalyst models. Particular emphasis is placed on the mechanisms of Cp*2Ru2S4 reactions. Extensions of this work include Cp*2Cr2O4 chemistry, cluster building reactions, and electrophylic M=S functionalities. The closing section focuses on simple metal complexes of thiophenes particularly as they relate to metal sulfide reactivity.