Pentamacrocyclic tris-crown hosts. Selective binding of cationic, anionic, and neutral guest compounds was written by Wallon, Alexander;Werner, Ute;Mueller, Walter M.;Nieger, Martin;Voegtle, Fritz. And the article was included in Chemische Berichte in 1990.Quality Control of 3,3”-Dibromo-5′-(3-bromophenyl)-1,1′:3′,1”-terphenyl This article mentions the following:
The tris-crown host compounds I [X, X1 = 1,3,5-C6H3 (Z), 1,3,5-(m-C6H4)3C6H3 (Z1), (p-C6H4)3CMe (Z2)] were synthesized for the first time. The x-ray crystal structures of I (X = Z, X1 = Z1) (II) the 1:3 complex of I (X = X1 = Z) (III) and KSCN were determined Whereas in the free crown II a less well preorganized mol. cavity is encountered, in the complex of III with KSCN one potassium ion is bound to each crown ether unit. One of the three SCN– anions is situated in the interior of the cavity and in addition is deoriented in such a way as to be bound to the K+ using partially the S atom of the SCN– ion. Organic guest mols. like 1,2-, 1,3-, 1,5-, 2,6-, and 2,7-naphthalenediol as well as β-naphthol in acidic water solution are bound selectively in the interior of the cavities of the host mol. II and I (X = X1 = Z1) but not by III and I (X = X1 = Z2) resp. In contrast, the binding of α-naphthol and of smaller phenolic guest mols. like phenol, resorcinol, pyrocatechol, phloroglucinol, pyrogallol, and 1,2,4-trihydroxybenzene with the hosts I is much less pronounced (1H-NMR highfield shifts). In the experiment, the researchers used many compounds, for example, 3,3”-Dibromo-5′-(3-bromophenyl)-1,1′:3′,1”-terphenyl (cas: 96761-85-2Quality Control of 3,3”-Dibromo-5′-(3-bromophenyl)-1,1′:3′,1”-terphenyl).
3,3”-Dibromo-5′-(3-bromophenyl)-1,1′:3′,1”-terphenyl (cas: 96761-85-2) belongs to organobromine compounds. Many of the organo bromine compounds are relatively nonpolar. Bromine is more electronegative than carbon (2.8 vs 2.5) and hence the carbon in a carbonbromine bond is electrophilic in nature. In the pharmaceutical industry organo bromine derivatives are used as sedatives, vasodilators, antiseptic agents, and anticancer agents.Quality Control of 3,3”-Dibromo-5′-(3-bromophenyl)-1,1′:3′,1”-terphenyl
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary