So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Fles, D. D.; Hace, D.; Ranogajec, F.; Vukovic, R.; Fles, D. researched the compound: 1-(tert-Butyl)-1H-pyrrole-2,5-dione( cas:4144-22-3 ).Computed Properties of C8H11NO2.They published the article 《The application of Taft-Hancock steric constants to the free-radical initiated copolymerization of N-alkylmaleimides with α-methylstyrene》 about this compound( cas:4144-22-3 ) in Polymer Bulletin (Berlin). Keywords: methylstyrene polymerization kinetics alkylmaleimide; steric constant alkylmaleimide polymerization methylstyrene; polar substituent constant polymerization alkylmaleimide. We’ll tell you more about this compound (cas:4144-22-3).
The rates of free-radical-initiated alternating copolymerization of α-methylstyrene with N-alkylmaleimides decrease in the following order: Me > Et > n-Pr ≈ n-Bu ≈ n-Hex > iso-Pr > tert-Bu. A linear relationship was established in the plots of log(kR/kMe) against the polar substituent constants, σ*, “”true steric”” factors, ES, and corrected steric factors, ESC. The best fit was obtained in plots of log (kR/kMe) vs. σ* and ESC whereas a large scattering of results was observed in the plot of log (kR/kMe) vs. ES.
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Reference:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics