New Chemistry of Fluorocarbon Ligands

氟碳配体的新化学

• 批准号: 0211158
• 负责人: Russell Hughes
• 金额: $ 38万
• 依托单位: Dartmouth College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-07-15 至 2005-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0211158&HistoricalAwards=false
• 关键词: New; Chemistry; Fluorocarbon; Ligands

This award by the Inorganic, Bioinorganic and Organometallic Chemistry program supports research by Russell P Hughes, Department of Chemistry, Dartmouth College, in fluorocarbon bond activation by transition metals. Hughes is developing novel catalytic routes to convert chlorofluorocarbons (CFCs) and perfluorocarbons (PFCs) to hydrofluorocarbons (HFCs). Aliphatic C-F bonds in fluoroalkyl groups bonded to a cationic iridium center undergo facile reaction with hydrogen gas under ambient conditions, resulting in the substitution of a C-H bond for the C-F bond. The fluoroalkyl groups may also react with methane to make a new carbon-carbon bond. By further study, the scope of these important reactions will be expanded to new substrates and catalysts. Perfluorocarbons and chlorofluorocarbons are industrially important chemicals used as refrigerants, foaming agents and solvents. However these compounds also are implicated in ozone depletion and global warming. Hydrofluorocarbons have many of the same useful properties, yet are more environmentally friendly. This research may lead to new useful HFCs as well as provide a new way to deactivate and recycle PFCs and CFCs.

该奖项由无机、生物无机和有机金属化学项目颁发，支持达特茅斯学院化学系 Russell P Hughes 在过渡金属碳氟键活化方面的研究。休斯正在开发新的催化路线，将氯氟碳化合物 (CFC) 和全氟化碳 (PFC) 转化为氢氟碳化合物 (HFC)。键合到阳离子铱中心的氟代烷基中的脂肪族C-F键在环境条件下容易与氢气发生反应，导致C-H键取代C-F键。氟代烷基还可以与甲烷反应形成新的碳-碳键。通过进一步研究，这些重要反应的范围将扩展到新的底物和催化剂。全氟化碳和氯氟碳是工业上重要的化学品，用作制冷剂、发泡剂和溶剂。然而，这些化合物也与臭氧消耗和全球变暖有关。氢氟碳化合物具有许多相同的有用特性，但更环保。这项研究可能会产生新的有用的 HFC，并提供一种钝化和回收 PFC 和 CFC 的新方法。