Studies of Carbon-Sulfur Bond Cleavage by Homogeneous Transition Metal Complexes

无机化学、生物无机化学和金属有机化学项目的这一奖项支持罗切斯特大学化学系的William D.Jones博士对金属噻吩类化合物中碳-硫键断裂的研究。主要目标是了解噻吩类和其他含硫化合物与过渡金属碎片相互作用的基本化学，并通过这样做来提高HDS催化剂的效率。将研究强碳硫键断裂的要求和详细的机理，以及含硫有机化合物与金属结合的结构基元。将特别关注金属巯基和硫化化合物，它们的相互转化和稳定性。此外，还将合成含膦配体与Re的链状化合物，并考察它们在加氢脱硫反应中的反应活性。加氢脱硫(HDS)是一种使用钼催化剂(有时是镍助剂)从化石燃料中脱除硫的过程。目前的技术在满足环境法规方面处于边缘地位，需要改进。这项研究的重点将是了解镍和其他金属在打破C-S键方面的作用，这是加氢脱硫催化循环中最有问题的步骤。

This award in the Inorganic, Bioinorganic, and Organometallic Chemistry Program supports research on carbon-sulfur bond cleavage in metal thiophene compounds by Dr. William D. Jones of the Chemistry Department, University of Rochester. The main goal is to understand the fundamental chemistry of the interaction of thiophenes and other sulfur-containing compounds with transition metal fragments and, in so doing, improve the effectiveness of HDS catalysts. The requirements and the detailed mechanism for cleavage of strong carbon-sulfur bonds will be investigated as well as the structural motifs for binding sulfur-containing organic compounds to metals. Particular attention will be paid to metal sulfhydryl and sulfido compounds, their interconversion, and lability. In addition, compounds containing tethered Cp-phosphine ligands with rhenium will be synthesized and their reactivity in HDS reactions investigated.Hydrodesulfurization (HDS) is a process of removing sulfur from fossil fuels using molybdenum catalysts, sometimes with a nickel promoter. Current technology is marginal in meeting environmental regulations and needs to be improved. This research will focus on understanding the role of nickel and other metals in breaking the C-S bond, the most problematic step in the HDS catalytic cycle.