
4-syaano-4 '-pentailbiphenail

c18h19n enna raasa soothravaakyamulla 4-syaano-4 '-pentailbiphenail saadhaaranayaayi upayogikkunna nematic liqvid kristalaanu. ithu palappozhum 5 sibi enna pothunaamathilaanu ariyappedunnathu. jorjju vilyam gray, kenn haarisan, jeey. ennivar chernnaanu 5 sibi aadyamaayi samanvayippichathu.eiii. 1972ll sarvakalashaalayil chernna naash akkaalat cyanobiphenylukalile aadya amgamaayirunnu. draavaka kristtal displakelil upayogikkuka enna prathyeka uddeshyathode ooshmaavinaduthulla draavaka kristtal gattangalulla oru draavaka kristtal kandethaan gray groupinu yuke prathirodha manthraalayathil ninnu graant labhichathine thudarnnaanu draavaka kristtal kandethiyathu. eee thanmaathraykk ekadesham 20 meter neelamundu. draavaka kristtal 5 sibi 22.5 digri selshyasil oru kristalin avasthayil ninnu nematic avasthayilekku oru ghatta parivarthanatthinu vidheyamaakunnu, ithu oru nemaattikkil ninnu 35 digri selshyasil oru isotropic avasthayilekku pookunnu.
uthppaadanam.
baifinaal oru rekheeya reethiyil parishkkarichaanu 5 sibi uthppaadippikkunnathu. bhaagatthinte avasaanathil oru bromin aattam avatharippikkunnathinaayi aadyathe bii. aarr. 2 baifinaal cherkkunnu. adutha aluminium chloride c4h9cocl umm saambililekku cherkkunnu, thudarnnu pottasyam hydroxide nh2nh2 umm cherkkunnu. eee samayamaakumbozhekkum thanmaathraykk karkkashamaaya korinte oru attathu bromin aattavum maruvashathu c5h11 umm undaakum. oduvil, chembu (i) sionide dii. emm. efum avatharippikkunnath bromin neekkam cheiyunnathinum pakaram cn upayogichu maattisthaapikkunnathinum 5 sibi nalkunnu.

