The Precise Synthesis of Phenylene-Extended Cyclic Hexa-peri-hexabenzocoronenes from Polyarylated [n]Cycloparaphenylenes by the Scholl Reaction was written by Quernheim, Martin;Golling, Florian E.;Zhang, Wen;Wagner, Manfred;Raeder, Hans-Joachim;Nishiuchi, Tomohiko;Muellen, Klaus. And the article was included in Angewandte Chemie, International Edition in 2015.Category: chlorides-buliding-blocks This article mentions the following:
The longitudinal extension of cycloparaphenylenes (CPP) towards ultrashort carbon nanotubes (CNTs) is essential for the solution based bottom-up synthesis of CNTs. Herein, the longitudinal extension of the CPP skeleton by the introduction of hexaphenylbenzene units towards polyarylated [n]CPPs is described. Further, the applicability of the Scholl reaction to selectively form graphenic sidewalls is demonstrated. The ring size and substitution patterns of the polyarylated [n]CPPs were varied to overcome strain-induced side reactions during the oxidative cyclodehydrogenation and cyclic para-hexa-peri-hexabenzocoronene trimers ([3]CHBCs) were selectively obtained. This concept is envisioned as an access to ultrashort carbon nanotubes subject to the condition that further benzene rings with the right connectivity will be inserted. In the experiment, the researchers used many compounds, for example, 5-Bromo-2-chloro-m-xylene (cas: 206559-40-2Category: chlorides-buliding-blocks).
5-Bromo-2-chloro-m-xylene (cas: 206559-40-2) belongs to organic chlorides. Organic chlorides can cause corrosion in pipelines, valves and condensers, and cause catalyst poisoning. The hydrocarbon processing industry (HPI) and others are affected by damage caused by these substances. Aryl chlorides may be prepared by the Friedel-Crafts halogenation, using chlorine and a Lewis acid catalyst.Category: chlorides-buliding-blocks
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics