Thermodynamic Studies of Metal/Sulfur/Hydrogen Systems

金属/硫/氢系统的热力学研究

• 批准号: 9221265
• 负责人: Carl Hoff
• 金额: $ 26万
• 依托单位: University of Miami
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-01-15 至 1996-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9221265&HistoricalAwards=false
• 关键词: Thermodynamic; Studies; Metal; Sulfur; Hydrogen

This award in the Inorganic, Bioinorganic, and Organometallic Program will support research on the thermodynamics of organometallic reactions by Dr. Carl D. Hoff of the Chemistry Department, University of Miami. Although Hoff will investigate a wide variety of reactions, of particular interest are reactions of molybdenum sulfur complexes. These complexes are chosen for study because of their involvement in hydrodesulfurization catalysis, which effects the removal of sulfur from fuels, and nitrogen fixation in plants. Oxidative addition of hydrogen, hydrogen sulfide, thiols, and disulfides to molybdenum will be studied. The enthalpies of binding of various sulfur-containing species--thioethers, thiols, hydrogen sulfide, thiophene, disulfides, metallothiolates, and sulfur dioxide--to molybdenum will also be determined. %%% Dr. Hoff will investigate the energetics of molybdenum-sulfur bonds. The results will be of wide interest because little fundamental data concerning the thermodynamics of metal-sulfur bonds is currently available. Sulfur can bond to metals in a variety of bonding modes (single, multiple, bridging) and the strength of these bonds is influenced by the oxidation state of the metal and the presence of other groups around the metal. Understanding the influence of these factors for the molybdenum case could contribute to a better understanding and control of the catalytic processes of hydrodesulfurization and nitrogen fixation.

该无机、生物无机和有机金属项目奖项将支持迈阿密大学化学系 Carl D. Hoff 博士对有机金属反应热力学的研究。 尽管霍夫将研究各种各样的反应，但特别感兴趣的是钼硫络合物的反应。 选择这些配合物进行研究是因为它们参与加氢脱硫催化，从而影响从燃料中去除硫以及植物中的固氮。 将研究氢、硫化氢、硫醇和二硫化物对钼的氧化加成。 各种含硫物质（硫醚、硫醇、硫化氢、噻吩、二硫化物、金属硫醇盐和二氧化硫）与钼的结合焓也将被测定。 %%% Hoff 博士将研究钼-硫键的能量学。 该结果将引起广泛关注，因为目前关于金属硫键热力学的基本数据很少。 硫可以多种键合模式（单键、多重键、桥键）与金属键合，这些键的强度受金属的氧化态和金属周围其他基团的存在的影响。 了解这些因素对钼情况的影响有助于更好地理解和控制加氢脱硫和固氮的催化过程。