Hastebringsnosuccess;hastemakeswaste;morehaste,lessspeed.[
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Don'tMakeAnyDecisionWhenYouAreAngry.
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OnFridayoneaccidenttookplaceinmyworkduetomystupidmistake.Thereactionwasaboutepoxideringopeningbyusing3-pentanolasnucleophilicreagentcatalyzedbyborontrifluoride.Whenthereactionwascompleted,IstartedtoquenchingthereactionbyaddingaqueoussaturatedsodiumbicarbonatesolutiontothereactionRBF.Becausethesodiumbicarbonatesolutionwasaddedtoofast,lotsoffoamwasgeneratedduetotheformationofcarbondioxidefromsodiumb...[
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Reactionincludingmetalreagentusuallygenerateheatandgas!Becareful!LastFridayIhadrunonereactionwhichisaboutthe1,4-Additionof1,3-DiesterstoConjugatedEnonesbyIn/TMSCl.WhenindiumwasaddedtoTHF,nothingtooksplacebutjustleadingtoonesuspension.Whendiethylbromomalonatewasadded,stillnothinghappened.However,whenTMSClwasaddedtotheabovemixture,hugeamountofheatandgaseswereproduced.Sothereactionmixturejustoverflow...[
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TodayIhadrunonereaction:nitrosationofdiphenylamine.TlCshowsthereactionworksprettywellandnostartingmaterialsexists.Becausetheproductisoneprecipitate.SoItrytogettheproductbyfiltration.BecausethereisstillproductintheRBFafterthedumping,ItrytowashthereactionRBFusingthefiltratetogetahighyield.HoweverIforgetatthistimethetemperatureofthefiltrateishigherthatthereactiontemperatureof5degree.Becauseofthis,som...[
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ThereisonereactionbetweenAandB.TheratioofA/Bintheliteratureis1:1.2,thatis,theoreticallyAisexcess.Butafterthereaction,itwasfoundthattheexcessedAisveryhardtoseparatefromtheproductC.SothereactionratiowasmodifiedtoA/B=0.9:1.Bythis,eventhoughtheyieldwaskindofless,pureproductwasobtainedmuchmoreeasily.[
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Becarefultousethecorrectamountofreactionreagent.TodayIuseRed-Altoconvertalkynetoalkene.Theconcentrationofitwas65%byweightintoluene.HoweverIuseitaspureonemistakely.Asaresult,theamountofRed-AlIaddedtomyreactionwasnotenoughandthereactiondidnotworkwell.Fortunately,thereactionisjustinsmallscale.Otherwise,thelostwillbeterriblyhuge.[
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Diamagneticanisotropyiscommonlyusedtorationalizetheunusualchemicalshiftsofprotonsinacetyleneandinaromaticandantiaromaticcompounds.[
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Becarefultousethecorrectamountofreactionreagent.TodayIuseRed-Altoconvertalkynetoalkene.Theconcentrationofitwas65%byweightintoluene.HoweverIuseitaspureonemistakely.Asaresult,theamountofRed-AlIaddedtomyreactionwasnotenoughandthereactiondidnotworkwell.Fortunately,thereactionisjustinsmallscale.Otherwise,thelostwillbeterriblyhuge.[
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Incarbohydratechemistry,ananomerisaspecialtypeofepimer.Itisoneoftwostereoisomersofacyclicsaccharidethatdiffersonlyinitsconfigurationatthehemiacetalorhemiketalcarbon,alsocalledtheanomericcarbon.[1]Putsimply,theanomericcarbonisthecarbonylcarbon,forexampleaketoneoraldehydefunctionalgroup,inacarbohydratemolecule.Anomerizationistheprocessofconversionofoneanomertotheother.Anomerizationistheanomericanalo...[
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