Fluorinated Closo-Heteroborane Anions and Nonclassical Metal Carbonyls

科罗拉多州立大学化学系Steven H. Strauss博士得到化学系无机、生物无机和有机金属项目的支持，研究氟化近异硼烷阴离子作为弱配位阴离子（WCAs）的使用，并研究非经典金属羰基。氟化近异硼烷阴离子将作为一组新的wca被开发出来，它们在各种条件下都是稳定的，包括在高温和酸碱水溶液中。这些阴离子相对便宜且易于制备，并将应用于涉及结构和键合，材料科学和催化的各种问题。wca将被用作具有很少或没有金属配体回键的阳离子金属羰基的反离子。将研究这些配合物的结构、键合和化学反应性，并开发其应用，包括Diels-Alder和Michael加成催化和聚合物混合物中的锂离子电导率。金属催化剂促进了许多重要的实验室和工业过程。这项研究的中心是一类化合物，其中带正电的金属碎片（称为阳离子）被一个不与金属强烈相互作用的带负电的大物种（这些被称为弱配阴离子或WCAs）所平衡。由于已知阳离子金属- wca配合物是多种反应的良好催化剂，因此本项目研究的新型wca非常重要，因为它们在实际应用中遇到的恶劣条件下价格低廉且稳定。这些化合物可用于一些重要的工业过程，包括气体净化、水气转换催化和甲醇合成催化。将研究的一个特殊应用是Cu(I)催化有机化合物在均相溶液中的羰基化。

Dr. Steven H. Strauss, Department of Chemistry, Colorado State University, is supported by the Inorganic, Bioinorganic, and Organometallic Program of the Chemistry Division for research into the use of fluorinated closo-heteroborane anions as weakly coordinating anions (WCAs) and for investigations into nonclassical metal carbonyls. Fluorinated closo-heteroborane anions will be developed as a new set of WCAs that are stable under a wide variety of conditions, including high temperatures and in aqueous acid and base solutions. These anions will be relatively inexpensive and easy to prepare and will be applied to a variety of problems involving structure and bonding, materials science, and catalysis. The WCAs will be used as counterions with cationic metal carbonyls that possess little or no metal-ligand pi backbonding. The structure, bonding, and chemical reactivity of these complexes will be studied and applications, including Diels-Alder and Michael addition catalysis and lithium ion conductivity in polymer blends, will be developed. Many important laboratory and industrial processes are facilitated by metal catalysts. This research centers about a class of compounds in which a positively charged metal containing fragment (called a cation) is counterbalanced by a large negatively charged species that does not interact strongly with the metal (These are termed weakly coordinating anions or WCAs.). Since cationic metal-WCA complexes are known to be good catalysts for a variety of reactions, the new WCAs, to be studied in this project, are important because they will be inexpensive and stable under the harsh conditions encountered in real world application. Some of the important industrial processes in which these compounds may be used include gas purification, water gas shift catalysis, and methanol synthesis catalysis. A particular application that will be studied is the Cu(I)-catalyzed carbonylation of organic compounds in homogeneous solution.