University:
Shippensburg University of Pennsylvania
Course:
CHM 121 | Chemical Bonding
Academic year:

2023
Views:

17

Pages:

31
Author:

GrabCapacity

• The extalyst of shave sen" may be betrogenees ton hebrogeneous Hy/Pd-C homegennom wilkinen" catalys "Hyvergenation of atkyre may be stopped at the alkene ttage This reduction is called partial reduction - Best Catalyst for partial reduction is "Lindar Catalys H₂/Pd, caro, [Suincling This catalyst is effective for alkene in the prevenite of lindas catalyst non-terminal alkyne convert into is-alkone (eternoselective sea"]. # Reduction of dromatic sừng Red" is Catalytic hydrogenation head of remake sung by bomatic in mare difficult than other functional group because, Aromatic Makliaticon energy is lost in the persees mou en strong condition reduction. That's why the ane required for [Rh: Pt Ro] are the best catalyst. Nanhthalene is reduce to tetralenemos radially, And Benzene is reduced to cyclohexans why? per benzene ring of waphthalene Resonance eningy per is 29 cas/maruthereas, cas/mel so low of amount of Bencene has 36 Kial/mol. Mekanana energy is less in naphthalene than Benzene. * Aromatic sung general gives partial sinduction in off retrogeneous catalyse -the presence of retrogeneous catalyst. #Reduction by o transfon seeagent: The Bisich sed in particularly arefist and comique in its ability to accomplish the partial seduction of dromatic rings mechanism. The mechanism of red" involute addition of electron followed by protonation of radical anian formation of 1,4- cyclohenadione is quite general in the type of red Bul for its formation in preference to the mere stable conjugated 1.3 cyclohexadiene is not clearly understood b/s it is kinetically controlled rea" of cycleheradienyl anion withdrawing electrophille typically take place at the central Carbon. The è donating group er alkyl, alkary etc decrease the rate of rea" and porction of mainly found the product. the non-redired # Reduction of hydrocarbons Reduction of Alte #Corrytic hydrogenation; 14 is one of the most convenient methat for the reduction of arkines. The method conius sin storing the substrate with a catalyst is a meitable ratuent in an atmsopties of hidrogen. It can be classified into bara on homogeneity of the reaction Heterogenzon hydrogenation- of hidrogeneous catalyst have been used for catalytic hydrogenation. • Modern procenes invelind a bansition metal catalyu [Rh, It, Pd) as the most ecomon. -selid support (Cand 117 Absorbed on a The catalytic take place between gaseous hydrogen and organic compound. Anduction lake place at the scarface of the catalyst which abiert bath hydrogen and organic compound! Transfer of hychogen take place from the catalyst to melecule remitting is reduction.