Furthermoreduetotimeconstraintsitwasdeterminedthatther

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Unformatted text preview: ndsodiummethoxideinto thesystem,whicharetwoby ­productsofthereaction,inordertohavealltheproductsneededforthe reactiontoruninreverse.TheeasiestwaytodothiswastosimplyreactfirstNaBH4withbenzaldehyde inmethanoltogenerateinsitutheNaBH3 ­methoxidecomplexneededtoallowreversibility.  IntheMPVreaction,fromthechangingproductratioitisclearthatthereactioncannothave rununderkineticcontrol,sincekineticcontrolwouldhaveformedasingle,unchangingratiothatwould haveremainedconstantovertime.Ifthereactionrunsunderthermodynamiccontrol,however,andone weretoplacethereactantsunderasetofconstantreactionconditions,thenonewouldobserve throughtestingatdifferentpointsintimethatthereactionmixwouldhaveevolvingproductratios whichwouldchangerapidlyatfirst,butthenbegintochangemoreandmoreslowlyasitapproached andfinallyreachedaconstant,finalproductratio.Inthisreaction,uponacidwork ­up,thealuminum isopropoxidecomplexseeninFigure2islostduetothereactionofthealuminumisopropoxidewith water,formingAl(OH)3.Losingsaidproductoftheoriginalreactio...
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