Russian Journal of General Chemistry p. 1283 - 1289 (2005)
Update date:2022-08-11
Topics:
Zyryanova
Baikalova
Tarasova
Afonin
Kukhareva
Maksimova
Trofimov
With respect to Co2+, Ni2+, Zn2+,Cd 2+, Cu2+, Pd2+, and Sn4+ salts, 1-isopropenyl-substituted imidazole, 2-methylimidazole, and pyrazole behave as monodentate ligands with only one coordination center on the N1 and N2 atoms, respectively; 1-isopropenylpyrazole under complex-formation conditions is dealkylated to form pyrazole complexes. The reaction with HCl leaves the unsaturated substituent in 1-isopropenylimidazole intact and yields corresponding hydrochlorides by the N3 atom of the heterocycle. The least basic 1-isopropenylpyrazole takes up HCl also by the double bond of the alkenyl group.
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