| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5134617 | Journal of Analytical and Applied Pyrolysis | 2017 | 8 Pages |
â¢FVP and static pyrolysis of Arylidenepyridylhydrazines 1a-e.â¢An interesting gas-phase oxidative cyclization reaction observed for the present hydrazines is described and explained.â¢These triazoloheterocycles are noted for their antifungal, antibacterial, and herbicidal effects.
Five arylidenepyridin-2-ylhydrazines (1a-e) were synthesized using conventional and microwave-enhanced techniques, and then subjected to flash vacuum and static (sealed-tube) pyrolysis. The pyrolysates from both reactions were analyzed, and their constituents characterized and identified. Further, the kinetics of pyrolysis of the substrates were investigated over the temperature range: 497-632Â K. Rates of reaction and entropies of activation at 500Â K were evaluated and used to correlate substrate molecular reactivities, and to provide evidence in support of the mechanism suggested for the pyrolysis reactions. An interesting gas-phase oxidative cyclization reaction observed for the present hydrazines is described and explained.
Graphical abstractDownload high-res image (71KB)Download full-size imageThe two pyrolysis pathways are compatible with product analysis, and rates and entropy of activation.
