Safety of 4-Bromobutanoic acidIn 2019 ,《Commercial Polymer Microsphere Grafted TBD-Based Ionic Liquids as Efficient and Low-Cost Catalyst for the Cycloaddition of CO2 with Epoxides》 appeared in Catalysis Letters. The author of the article were Dai, Weili; Mao, Jie; Liu, Ying; Mao, Pei; Luo, Xubiao; Zou, Jianping. The article conveys some information:
Development of efficient, cheap and recyclable catalysts for the synthesis of cyclic carbonates from CO2 and epoxides is still a very attractive topic. Herein, the polymer grafted TBD-(1,5,7-triazabicyclo[4.4.0]dec-5-ene)-based ionic liquids (ILs) were fabricated from com. available polystyrene (PS) and ingredients of the ILs, and used as heterogeneous catalysts for the conversion of CO2 into cyclic carbonates in the absence of solvent and co-catalyst. To improve the catalytic performance, various substitutes (such as -COOH, -OH and -NH2) were functionalized on the TBD cation. Among the as-obtained catalysts, carboxyl-containing catalyst (PS-[CETBD]Br) showed superior activity than others, which may be attributed to the stronger polarization capability of -COOH on the C-O bond of epoxide through the formed hydrogen bonding. Addnl., the combined synergistic effect of the nucleophilic attack by the halide anions also account for the facile ring-opening of epoxide. It is noted that CO2 can be activated by the formation of carbamate between CO2 and alk. nitrogen of the TBD cations, thus facilitating the formation of cyclic carbonates. Moreover, the catalyst shows good chem. stability and catalytic reusability, which is very important for the practical conversion of CO2 in chem. industry. The experimental part of the paper was very detailed, including the reaction process of 4-Bromobutanoic acid(cas: 2623-87-2Safety of 4-Bromobutanoic acid)
4-Bromobutanoic acid(cas: 2623-87-2) belongs to carboxylic acids. The chief chemical characteristic of the carboxylic acids is their acidity. They are generally more acidic than other organic compounds containing hydroxyl groups but are generally weaker than the familiar mineral acids (e.g., hydrochloric acid, HCl, sulfuric acid, H2SO4, etc.).Safety of 4-Bromobutanoic acid
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary