English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Mono- and 1,1-dinitrocyclobutanes (highly diluted in Ar) were pyrolyzed at temperatures 860–1300 K in reflected shocks.  Activation energies for their initial fragmentations were derived from measurements of relative rates of species loss, compared to cyclobutyl chloride and isopropyl bromide:  k  uni (NCB) = 9.66 × 10 12  exp (-25264/ T ), s -1 ,  k  uni (DNCB) = 6.26 × 10 12  exp (-21087/ T ), s -1  The production and decay of NO 2  was monitored in real time via its absorption at 405 nm. The identity and amounts of the species produced during 1.3 ms residence time were determined by FTIR and GC analysis of samples extracted from the tube terminus, after being quenched by an expansion wave. Plausible mechanisms that account for the observed product distributions are proposed. In a computational Appendix, the results of density functional theory (DFT) calculations are presented for enthalpies and entropies of several mono-substituted cyclobutanes and for 1,1-dinitrocyclobutane, as well as for selected fragmentation products.

zeitschrift für physikalische chemie

The Gas-Phase Pyrolysis of  Nitrocyclobutanes: a Shock-Tube Investigation Supplemented with DFT Calculations of their Thermochemical and Structural Parameters