Synthesis, Characterization and Reactivity of a Tetra(Acetonitrile) Ruthenium(II) Complex, [(NCCH3)4RuPh(P{OCH2}3CEt)][BArF]
Location
College of Science and Mathematics (COSM)
Session Format
Poster Presentation
Co-Presenters and Faculty Mentors or Advisors
Dr. Brandon Quillian, Faculty Advisor
Abstract
Development of petroleum processing technologies is prudent for the preservation of this vital resource. Hydroarylation of olefins is a common method in the chemical industry to produce precursors from petroleum for the production of commodity and fine chemicals. We have been developing ruthenium-based olefin hydroarylation catalysts for the production of alkylbenzenes that have lower energy profiles and produce significant less hazardous waste as compared to contemporary methods. In this presentation, we discuss our ongoing efforts in the synthesis of a ruthenium catalyst supported by bis(pyrazolyl)acetate (BPA). Several intermediates were prepared en route to our final catalyst, including an interesting, cationic, tetra(acetonitrile) ruthenium complex, ([(NCCH3)4RuPh(P{OCH2}3CEt)][BArFâ], with phenyl and ancillary phosphorus ligands. The compound and its precursors were characterized by 1H NMR spectroscopy and single crystal X-ray crystallography. Its crystal structure revealed two acetonitrile ligands trans to one another and two trans to the phenyl and phosphorus ligands. Two of the acetonitrile ligands are very labile, while the other two are resistant to dissociation. This property was leveraged to selectively react it with sodium bis(pyrazolyl)acetate (KBPA) to form the putative complex ([κ2-BPA(NCCH3)2RuPh(P{OCH2}3CEt)] [BArF][Ag]. The controlled reactivity could be used in the future to produce different variants of our catalyst.
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
Presentation Type and Release Option
Presentation (Open Access)
Recommended Citation
Durrell, George, "Synthesis, Characterization and Reactivity of a Tetra(Acetonitrile) Ruthenium(II) Complex, [(NCCH3)4RuPh(P{OCH2}3CEt)][BArF]" (2021). GS4 Georgia Southern Student Scholars Symposium. 59.
https://digitalcommons.georgiasouthern.edu/research_symposium/2021/2021/59
Synthesis, Characterization and Reactivity of a Tetra(Acetonitrile) Ruthenium(II) Complex, [(NCCH3)4RuPh(P{OCH2}3CEt)][BArF]
College of Science and Mathematics (COSM)
Development of petroleum processing technologies is prudent for the preservation of this vital resource. Hydroarylation of olefins is a common method in the chemical industry to produce precursors from petroleum for the production of commodity and fine chemicals. We have been developing ruthenium-based olefin hydroarylation catalysts for the production of alkylbenzenes that have lower energy profiles and produce significant less hazardous waste as compared to contemporary methods. In this presentation, we discuss our ongoing efforts in the synthesis of a ruthenium catalyst supported by bis(pyrazolyl)acetate (BPA). Several intermediates were prepared en route to our final catalyst, including an interesting, cationic, tetra(acetonitrile) ruthenium complex, ([(NCCH3)4RuPh(P{OCH2}3CEt)][BArFâ], with phenyl and ancillary phosphorus ligands. The compound and its precursors were characterized by 1H NMR spectroscopy and single crystal X-ray crystallography. Its crystal structure revealed two acetonitrile ligands trans to one another and two trans to the phenyl and phosphorus ligands. Two of the acetonitrile ligands are very labile, while the other two are resistant to dissociation. This property was leveraged to selectively react it with sodium bis(pyrazolyl)acetate (KBPA) to form the putative complex ([κ2-BPA(NCCH3)2RuPh(P{OCH2}3CEt)] [BArF][Ag]. The controlled reactivity could be used in the future to produce different variants of our catalyst.
