Synthesis of ionic liquids in the undergrad organic chemistry laboratory

CHED 443

Michael A. Brooks Jr., brooksm@csp.edu, Nathan D. Burrows, burrowsn@csp.edu, and Dr. David W. Blackburn, blackburn@csp.edu. Concordia University, St. Paul, MN 55104
The poster will present a solventless room-temperature synthesis and an optimization of the microwave synthesis of the hydrophilic ionic liquids butylmethylimidizolium bromide (BMImBr); the ion-exchange metathesis in the synthesis of the hydrophobic ionic liquid butylmethylimidizolium hexafluorophosphate (BMImPF6); and improvements in this metathesis reaction with potassium hexafluorophosphate (KPF6) which is an alternative to the toxic and highly corrosive hexafluorophosphoric acid. Together these represent three variations on a green chemistry experiment that can be used in the first-semester organic chemistry laboratory. Results presented will include: student feedback, optimum microwave conditions, and ideal ion-exchange conditions.