Iridium Complexes on the Border between Organometallic and Coordination Complexes

无机、生物无机和有机金属项目的这一奖项将支持纽约州立大学布法罗分校的吉姆·D·阿特伍德博士继续开展有关铱化合物的工作。该化合物具有通式RIR(CO)L2，其中R=烷基、烷氧基、羟基或氯，而L=膦或取代膦。这些物种将被用来探索三个领域：模拟水溶液中的催化反应，研究含有软硬配体混合物的络合物的反应性，以及研究络合物与气态二氧化硫和一氧化二氮的反应性。前两个项目与优化催化反应有关，第三个项目可能对减少空气污染物产生影响。对于第一个项目，将使用磺化膦以使物种在水溶液中增溶。在第二个项目中，化合物中将包含碳酸盐和硫酸盐配体，以及羰基、烷氧基和膦基团。相关络合物的初步证据表明，同时含有软硬配体的化合物的取代反应很快，这一现象将得到专门的研究。在第三个项目中，将研究二氧化硫和一氧化二氮取代硫酸盐配体。如果发生这样的反应，气体将被固体有效地吸收。

This award in the Inorganic, Bioinorganic and Organometallic Program will support continued work on iridium compounds by Dr. Jim D. Atwood of the State University of New York at Buffalo. The compounds are of general formula RIr(CO)L2, where R = alkyl, alkoxy, hydroxo, or chloro, and L = phosphine or substituted phosphine. These species will be used to probe three areas: to model catalytic reactions in aqueous solution, to study reactivity of complexes containing mixtures of hard and soft ligands, and to study the reactivity of complexes with gaseous sulfur dioxide and nitrous oxide. The first two projects are relevant to optimizing catalytic reactions and the third project may have implications for reducing air pollutants. For the first project, sulfonated phosphines will be used in order to solubilize the species in aqueous solution. In the second project, carbonate and sulfate ligands will be contained in the compounds, along with carbonyl and the alkoxy and phosphine groups. Preliminary evidence on related complexes suggests that substitution reactions of compounds containing both hard and soft ligands are rapid, and this phenomenon will be specifically investigated. In the third project, the substitution of sulfate ligands by sulfur dioxide and nitrous oxide will be investigated. If such reaction occurs, the gases will be effectively absorbed by a solid.