Vinyl bromides undergo the Heck reaction, which involves C-C coupling with alkene to give substituted alkenes. 1575-37-7, formula is C6H7BrN2, Name is 4-Bromobenzene-1,2-diamine. Methyl bromide is a precursor in the manufacture of several chemicals and is employed as a soil sterilant, mainly for seed production. Category: bromides-buliding-blocks.
Chen, Zhangxin;Mei, Shiwei;Li, Weijun;Xu, Ning;Dong, Yujie;Jin, Yanxian;Ouyang, Mi;Zhang, Cheng research published 《 Study of multi-electron redox mechanism via electrochromic behavior in hexaazatrinaphthylene-based polymer as the cathode of lithium-organic batteries》, the research content is summarized as follows. The charging and discharging mechanism of lithium-organic batteries has always been a challenging issue due to the lack of popularity of in situ characterization technol. during the charge/discharge process. In this article, a novel open lithium battery test combining the in situ electrochem. and UV spectral tests is firstly studied to explore the multi-electron redox mechanism of hexaazatrinaphthylene-based polymers as a cathode of lithium-organic batteries. Two triphenylamine-hexanazonaphthalene structure conjugated microporous polymers (PTPA-HATN and PDTPA-HATN) have been synthesized as models to study the charging and discharging mechanism of hexazanaphthalene. Both possess similar nanosphere morphol. and high surface area (~450 mA h g-1) as well as abundant microporous structure. Using them as cathodes to explore the lithium battery performance, an obvious charge-discharge process with multi-electron redox characteristics can be observed in both, and the one with PTPA-HATN shows a higher discharge capacity (~168 mA h g-1) and better rate performance than those of PDTPA-HATN in LiClO4 electrolyte. Combining the in situ electrochem. and UV spectral results, a new multi-electron redox mechanism of hexanazonaphthalene-based polymer cathodes in lithium-organic batteries is proposed. Different from the previously reported mechanisms, the N and N lone electron pairs of the hexanazonaphthalene group in the polymer film will adsorb Li+ to form the N-Li-N bond in the electrolytes with low HF acid content accompanied with the red shift of absorption peak in the spectra under the open circuit voltage. During the discharge process, the N-Li-N bond will break and combine with the newly entered Li+ to form the N2-Li2 bond, resulting in a new large blueshift in the spectra. This work may provide new insight into the redox mechanism of functional groups of organic cathode materials via electrochromic behavior on the performance of lithium batteries.
1575-37-7, 4-Bromo-1,2-diaminobenzene can be obtained from 1,2-diaminobenzene via acetylation followed by bromination and alkaline hydrolysis.
4-Bromobenzene-1,2-diamine, also known as 4-Bromobenzene-1,2-diamine, is a useful research compound. Its molecular formula is C6H7BrN2 and its molecular weight is 187.04 g/mol. The purity is usually 95%.
4-Bromo-1,2-diaminobenzene is a dye that is used in diagnostic
procedures to detect the presence of amide groups. 4-Bromo-1,2-diaminobenzene can be used as an inhibitor for cationic polymerization reactions. It also has tuberculostatic activity and inhibits the growth of Mycobacterium tuberculosis. This compound reacts with aniline to form a benzimidazole derivative that contains a reactive amine group. The reaction between this amine group and different electrophiles generates benzimidazole compounds with different properties that are useful in nucleophilic attack reactions. The reaction between 4-bromo-1,2-diaminobenzene and methyl ethyl sulfide produces a luminescent probe that can be used to detect hydrogen bonds., Category: bromides-buliding-blocks
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary