Category: piperazines. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: 1-(Bromomethyl)-4-iodobenzene, is researched, Molecular C7H6BrI, CAS is 16004-15-2, about Adsorption and corrosion inhibition behaviour of new theophylline-triazole-based derivatives for steel in acidic medium. Author is Espinoza-Vazquez, Araceli; Rodriguez-Gomez, Francisco Javier; Martinez-Cruz, Ivonne Karina; Angeles-Beltran, Deyanira; Negron-Silva, Guillermo E.; Palomar-Pardave, Manuel; Romero, Leticia Lomas; Perez-Martinez, Diego; Navarrete-Lopez, Alejandra M..
The design and synthesis of a series of theophylline derivatives containing 1,2,3-triazole moieties are presented. The corrosion inhibition activities of these new triazole-theophylline compounds were evaluated by studying the corrosion of API 5 L X52 steel in 1 M HCl medium. The results showed that an increase in the concentration of the theophylline-triazole derivatives also increases the charge transference resistance (Rct) value, enhancing inhibition efficiency and decreasing the corrosion process. The electrochem. impedance spectroscopy under static conditions studies revealed that the best inhibition efficiencies (approx. 90%) at 50 ppm are presented by the all-substituted compounds According to the Langmuir isotherm, the compounds 4 and 5 analyzed exhibit physisorption-chemisorption process, with exception of the hydrogen 3, bromo 6 and iodo 7 substituted compounds, which exhibit chemisorption process. The corrosion when submerging a steel bar in 1 M HCl was studied using SEM-EDS. This experiment showed that the corrosion process decreases considerably in the presence of 50 ppm of the organic inhibitors.
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Piperazine – Wikipedia,
Piperazines – an overview | ScienceDirect Topics