Spectroscopic study of the electron-donor properties of 1-vinyl- and 1-ethylazoles

Basicity and acidity of azoles: the annelation effect in azoles

“…Azole Basicities in Aqueous Solution. Equation 18and the aqueous basicity data of Table V give (20) in which the isoequilibrium temperature ß = -1638 K, is a little smaller than the previous one but still of the same anticompensation class.39 AH°= 1.155 (±0.086) + 0.846 (±0.038)AG° (20) From Table I data, the AG°values for equilibria 23 and 24 are respectively: Since azoles are heteroaromatic bases, it is interesting to compare them with pyridines, to find out whether there are differences due to the ring size, hybridation, or aromaticity. From The slopes of ( 20) and ( 21) and the corresponding ß values are very similar; the azoles behave as pyridinic bases.…”

Complexes of 1-vinylazoles with transition metals in radical polymerization

“…Figure 3 Localization of the noncoupled electron in radicals simulating the growing macroradicals. 4) in comparison with the free monomers is attributable to an increase of the electron-acceptor properties of the substituent at the double bond in coordination with ZnCl 2 . In the case of 2VBT ⅐ ZnCl 2 , which is nearly fully dissociated in solution, the increase of the polymerization rate is due to SP, the rate of which is comparable to the rate of the polymerization under the action of AIBN.…”