Synthesis and Characterization of Molybdenum N-Heterocyclic Phosphenium and Phosphido Complexes
redox non-innocent ligand
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Publisher:The Ohio State University
Series/Report no.:The Ohio State University. Department of Chemistry and Biochemistry Honors Theses; 2021
In this work, a variety of synthetic and computational studies unified by the theme of cooperativity in catalyst design are described. Although noble metals are used abundantly in the field of catalysis, they are not abundant in the Earth's crust. As such, the strategies of both metal-ligand cooperativity and metal-metal cooperativity offer sustainable alternatives by enabling desirable chemistry at base metals. In both cooperative strategies, the redox burden at a metal is alleviated by a ligand or additional metal that is capable of either chemical modification or direct substrate bond activation. In this work, coordination of a N-heterocyclic phosphine (NHP) pincer ligand to a molybdenum carbonyl fragment is explored. Evidence for both formally phosphenium (NHP+) and phosphido (NHP-) molybdenum carbonyl complexes synthesized from it are presented, highlighting the ligand's redox non-innocence. The phosphenium complex or a derivative thereof may be capable of σ bond activation, though reactivity is not explored in this work.
Academic Major: Chemistry
NSF Grant CHE-1764170
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