Hydrogenation ntawm benzene ntawm kev kub siab Txawm hais tias nws ua tau yooj yim dua li alkenes yooj yim los yog dienes, benzene ntxiv hydrogen ntawm kev kub siab nyob rau hauv muaj Pt, Pd lossis Ni catalysts. Cov khoom yog cyclohexane thiab lub tshav kub ntawm cov tshuaj tiv thaiv muab pov thawj ntawm benzene lub thermodynamic stability.
Yuav txo tau benzene?
Birch Txo yog cov txheej txheem rau hloov benzene (thiab nws cov txheeb ze uas muaj ntxhiab) mus rau 1, 4-cyclohexadiene siv sodium (los yog lithium) ua tus neeg sawv cev txo qis hauv cov kua ammonia raws li hnyav (qhov kub kub: -33 ° C) Thaum muaj cawv xws li ethanol, methanol lossis t-butanol.
Y Yuav ua li cas yog cov khoom siv hydrogenated ntawm benzene?
Via hydrogenation, benzene thiab nws cov derivatives hloov mus rau cyclohexane thiab derivatives. Cov tshuaj tiv thaiv no tau ua tiav los ntawm kev siv lub zog siab ntawm hydrogen nyob rau hauv lub xub ntiag ntawm heterogeneous catalysts, xws li finely faib npib tsib xee.
YPuas yog hydrogenation ntawm benzene exothermic?
Txawm hais tias hydrogenation ntawm benzene los ua cyclohexane (ntxiv peb lub molecules ntawm hydrogen ib molecule ntawm benzene) yog ib qho
exothermic cov tshuaj tiv thaiv , hydrogenation ntawm benzene los ua cyclohexadiene −1, 3 (ntxiv ib qho hydrogen molecule ib molecule ntawm benzen) yog cov tshuaj tiv thaiv endothermic.
Dab tsi yog monosubstituted benzene?
Monosubstituted Benzene
Thaum ib qho ntawm txoj haujlwm ntawm lub nplhaib tau raug hloov nrog lwm lub atom lossis pawg ntawmatoms, cov compound yog monosubstituted benzene. Yog tias ob txoj haujlwm raug hloov, ces nws yog qhov tsis hloov pauv, & lwm yam.
