Highly efficient gas-phase reactivity of protonated pyridine radicals with propene
Cameron C Bright, Matthew B Prendergast, Patrick D Kelly, James P Bezzina, Stephen J Blanksby, Gabriel da Silva, Adam J Trevitt
PHYSICAL CHEMISTRY CHEMICAL PHYSICS | ROYAL SOC CHEMISTRY | Published : 2017
Small nitrogen containing heteroaromatics are fundamental building blocks for many biological molecules, including the DNA nucleotides. Pyridine, as a prototypical N-heteroaromatic, has been implicated in the chemical evolution of many extraterrestrial environments, including the atmosphere of Titan. This paper reports on the gas-phase ion-molecule reactions of the three dehydro-N-pyridinium radical cation isomers with propene. Photodissociation ion-trap mass spectrometry experiments are used to measure product branching ratios and reaction kinetics. Reaction efficiencies for 2-dehydro-N-pyridinium, 3-dehydro-N-pyridinium and 4-dehydro-N-pyridinium with propene are 70%, 47% and 41%, respecti..View full abstract
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Awarded by Australian Research Council through the Discovery programs
The authors are grateful for the financial support of the Australian Research Council through the Discovery programs (AJT and SJB: DP170101596, AJT and GdS: DP130100862 and GdS: FT130101304). CCB, JPB and MBP were supported by Australian Government Research Training Program (RTP) Scholarships. The authors also acknowledge the generous allocation of computing resources by the NCI National Facility (Canberra, Australia) under the Merit Allocation Scheme.