Design of a Gas Rapid Injection Nuclear Magnetic Resonance System for Structure Elucidations and Kinetic Analyses

A gas rapid injection nuclear magnetic resonance (GRI-NMR) device was designed and constructed for the precise delivery of gases at atmospheric pressures for real-time data acquisition. The GRI-NMR system precluded any modifications to the NMR instrument itself and was implemented for the kinetic analysis of ligand displacement using a highly sensitive nickel(0) complex with carbon dioxide gas.

A gas rapid injection nuclear magnetic resonance (GRI-NMR) system has been constructed to investigate reactions requiring the use of gas reagents. The system allows for the accurate delivery of gases under inert conditions to a standard NMR glass tube inside the spectrometer permitting in situ reaction monitoring to be conducted which mimics reactions performed at the bench. The system provides a unique avenue to investigate reaction systems that require a continuous and/or precise delivery of gas reagents. To showcase the newly constructed GRI-NMR system, the reaction of carbon dioxide binding with phosphine-ligated nickel zero complexes is monitored in real time providing detailed kinetic data.

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