Influence of acetylene-containing peripheral chains on the mesomorphic properties of triphenylene-based liquid crystals was written by Stackhouse, Philip J.;Hird, Michael. And the article was included in Liquid Crystals in 2009.Application In Synthesis of 1-Bromo-6-chlorohexane The following contents are mentioned in the article:
Three series of acetylene-containing triphenylene-based liquid crystals have been prepared One class of material is sym. with the acetylenic unit located at the terminus of a peripheral alkynyloxy chain in a peripheral position at the terminus of an alkoxy chain. These sym. hexa-substituted materials possess high m.ps. which renders mesomorphism monotropic. A second class comprises materials where only one of the six peripheral units contains a terminal alkyne chain. The asymmetry confers relatively low m.ps. and an enantiotropic hexagonal columnar mesophase is exhibited for all materials, albeit to a lower temperature than the known parent systems. The third series of materials also comprises unsym. structures, here containing one acetylenic unit conjugated with the triphenylene core and five alkoxy chains. This third series of materials show enhanced π-π interactions and enhanced space-filling effects of the acetylenic unit close to the core which enhance mesophase stability markedly over the hexaalkoxy analogs. This result shows that rigidity of peripheral chains, as opposed to mol. symmetry, is the significant factor for the reduction of mesophase stabilities. This study involved multiple reactions and reactants, such as 1-Bromo-6-chlorohexane (cas: 6294-17-3Application In Synthesis of 1-Bromo-6-chlorohexane).
1-Bromo-6-chlorohexane (cas: 6294-17-3) belongs to organic chlorides. Chlorination modifies the physical properties of hydrocarbons in several ways. These compounds are typically denser than water due to the higher atomic weight of chlorine versus hydrogen. Aryl chlorides may be prepared by the Friedel-Crafts halogenation, using chlorine and a Lewis acid catalyst.Application In Synthesis of 1-Bromo-6-chlorohexane
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics