简介：

简介：Thereactionsofimidatesincludingcyclicimidates,oxazolinesanddihydrooxazinewithphenoxyacetylchloride,wereinvestigated.TheresultsindicatethatdiacylamideoracylamidewasgeneratedfromN-phenoxyacetylatedimidates,whilecyclicimidateoxazolinesunderwentaring-openingreactiontoyielddifferentamidesdependingonthereactionconditions.Evenundernon-nucleophilicconditions,noβ-lactam-fusedoxazolinederivativewasobtained.

简介：

简介：

简介：TheunimolccularreactionsofammoniaoxideH3NO,isomerizationanddehydrogenation,areinvestigatedbyabinitioMOcalculationswiththe4-31Gbasisset.Thegeometriesandenergiesofthereactant,transitionstatesandproductshavebeendeterminedonthesingletpotentialenergysur-face.Thereactionergodographyalongtheintrinsicreactioncoordinate（IRC）forthetworeactionshavebeenperformed.ThevibrationalfrequencycorrelationdiagramofthetworeactionsareanalyzedalongtheIRC.

简介：在量以内分子的动力学(QMD)模型，动态octupole变丑在重离子的熔化反应的来临的过程作为在射弹和目标之间的中央距离的功能被学习。事件精力上的最大的动态octupole变丑的依赖也被调查。动态octupole变丑能在来临的过程期间被观察，并且最大的动态octupole变丑与减少的事件精力变得更重要。在射弹和目标的质子和中子中心的分布也分别地被调查。在重离子的熔化反应的来临的过程，因为强壮的库仑潜力，在二个原子核的质子中心之间的分离在中子中心之间比那大。

简介：Difluorocarbenegeneratedfromthedecompositionoffluorosulfonyldifluoroaceticacid(2)reactedwithvarioussodiumsaltsofN-heterocycliccompounds(1)givingthecorrespondingdifluoro-methylatedproductsinacetonitrileat10—40℃.Benzotriazole(1a),benzimidazole(1b)andimidazole(1c)wereconvertedinto1-(difluoromethyl)benzotriazole(3a),1-(difluoromethyl)benzimidazole(3b)and1-(difluoromethyl)imidazole(3c)respectively.Indole(1d)reactedwith2togive-(fluorosulfonyldifluoro-acetate)indole(2d)ratherthantheexpecteddifluoromethylatedderivatives.

简介：在在精力的反应关上到库仑障碍的multinucleon转移的主要进步被考察。在试验性的进步和理论进步的一个短演讲以后，为未知充满中子的重原子核和trans铀原子核的预言的生产十字节被介绍。

简介：Theaimofthisarticleistostudytheeffectivebehaviorofthesolutionofanonlinearproblemarisinginthemodellingofenzymecatalyzedreactionsthroughtheexteriorofadomaincontainingperiodicallydistributedreactivesolidobstacles,withperiodε.Theasymptoticbehaviorofthesolutionofsuchaproblemisgovernedbyanewellipticboundary-valueproblem,withanextrazero-ordertermthatcapturestheeffectoftheenzymaticreactions.

简介：ＱｕａｎｔｕｍＭｏｌｅｃｕｌａｒＤｙｎａｍｉｃｓＡｐｐｒｏａｃｈｆｏｒＬｏｗＥｎｅｒｇｙＨｅａｖｙＩｏｎＲｅａｃｔｉｏｎｓ￥ＷｅｉＺｈｉｙｏｎｇａｎｄＺｈｕＹｏｎｇｔａｉＦｒａｇｍｅｎｔａｔｉｏｎｉｎｔｈｅｈｅａｖｙｉｏｎｒｅａｃｔ...

简介：Animidazolemodifiedsilverelectrodeispreparedbyimmersingthesubstratesilverelectrodeina2%imidazolesolutionofethanolat50℃for10min.Themodifiedelectrodeisthensweptinacytochromecsolutionandthemodifiedlayertakesoffbecausethemodifiedelectrodeisveryunstable.Althoughtheamountofthesilver-imidazolecomplexisverysmallcomparedwiththeamountofcytochromecintheproteinsolution,itgreatlyfacilitatesredoxreactionsinvolvingthebiomacromolecules.

简介：Bis(β-alkoxy-ethylcyclopentadienyl)titanium(zirconium)dichlorideswasnewlysynthe-sized,andthroughinterfacialpolycondensationofbis(β-alkoxy-ethylcyclopentadienyl)titaniumdichlorideswithdiacids,diphenols,andhydroxy-acids,aseriesofnewtitaniumpolymerswereprepared.Thepolymersobtainedareyellowincolor,havingmol.wtsbetween10^3-10^6.Theypossessheat-resistantpropertiesandshowbettersolubilitiesthatCarraher′sseries.Thus,TG/DTGdeterminationsshowedthatwhilesufferinginitiallossofwts.ataround260℃-470℃,theyremainstableat600-800℃.Residualwts.arearound50%oftheinitialat947.5℃.Theyaresolubleinglacialaceticacid,DMAC,DMF,andDMSO.

简介：Morelocalizedenergydepositionisabletobeproducedinantiproton-nucleuscollisionsincomparisonwithheavy-ioncollisionsduetoannihilationreactions.Searchingforthecoldquark-gluonplasma(QGP)withantiprotonbeamshasbeenconsideredasahottopicbothinexperimentsandinthereticalcalculationsoverthepastseveraldecades.Strangenessproductionandhypernucleusformationinantiproton-inducednuclearreactionsareimportanceinexploringthehyperon(antihyperon)-nucleon(HN)potentialandtheantinucleon-nucleoninteraction,whichhavebeenhottopicsintheforthcomingexperimentsatPANDAinGermany.

简介：Carbonsupportedgold-iridiumcomposite(AuIr/C)wassynthesizedbyafacileone-stepprocessandwasinvestigatedasthebifunctionalcatalystforoxygenreductionreaction(ORR)andoxygenevolutionreaction(OER).ThephysicalpropertiesoftheAuIr/Ccompositewerecharacterizedbytransmissionelectronmicroscopy(TEM),X-raydiffraction(XRD)andX-rayphotoelectronspectroscopy(XPS).AlthoughtheAuandIrintheAuIr/Cdidnotformalloy,itisclearthattheintroductionofIrdecreasestheaverageAuparticlesizeto4.2nmcomparedtothatintheAu/C(10.1nm).BysystematicalanalysisonchemicalstateofmetalsurfaceviaXPSandtheelectrochemicalresults,itwasfoundthattheAusurfacefortheAu/Ccanbeactivatedbypotentialcyclingfrom0.12Vto1.72V,resultingintheincreasedsurfaceroughnessofAu,thusimprovingtheORRactivity.Bythesamepotentialcycling,theIrsurfaceoftheIr/Cwasirreversiblyoxidized,leadingtodegradedORRactivitybutuninfluencedOERactivity.FortheAuIr/C,IrprotectsAuagainstbeingoxidizedduetothelowerelectronegativityofIr.CombiningtheadvantagesofAuandIrincatalyzingORRandOER,theAuIr/CcatalystdisplaysanenhancedcatalyticactivitytotheORRandacomparableOERactivity.Inthe50-cycleacceleratedagingtestfortheORRandOER,theAuIr/Cdisplayedasatisfiedstability,suggestingthattheAuIr/Ccatalystisapotentialbifunctionalcatalystfortheoxygenelectrode.

简介：TheauthorshavestudiedtheDiels-Alderreactionsbetweenfuranderivativesandmaleimidederivativesinanionicliquidandhavefoundthathigherreactivitycanbeobtainedinaproticionicliquid[Mim]Tf2Nthanintheconventionalorganicsolvent.Furthermore,intheDiels-Alderreactionsof2-and2,5-alkylfuranswithN-alkylma-leimide,thereactivityincreasesbyextendingthealkylchainlengthofN-alkylmaleimide.Inaddition,itwasdemon-stratedthatendo-selectivityincreaseswhen2,5-disubstitutedfuransareused.TheseresultswillbeexplainedbycomparingthestabilityoftheDiels-Alderadductwiththatoftheproductsobtainedfromthereactionsof2-substitutedfuransand2,5-disubstitutedfurans.更多还原

简介：AReviewwith56referencesonthereactionbetweenboricacidandpolyhydroxycompounds,andthedevelopmentsofboron-selectiveresins.

简介：AconvenientprocedureforthepreparationofsomenewgermasesquioxidescontainingphosphonylgroupscarriedbyanintramolecularcatalyticMannich-typereactionisreported.

简介：Propargyliccarbonatesreactedwithdialkylcycloalkanone-α,α′-dicarboxylatesunderthecatalysisofPd(0)complextogivebicycliccompoundsinhighyields.Thetwoelectron-withdrawinggroupsatαandα′positionsofcycloalkanoneringsareessentialfortheannulationreaction.

简介：Basedonageneralclassificationandcharacteristiccomparisonoftheexistingmodels,anewmodelfornon-catalyticgas-solidreactionsisproposedandageneralformulationforthemodelintermsofthesolidconversion,X,ispresentedinthispaper.Themodel,referredtothegeneralizedmodel,isdemonstratedtobeapplicabletoanysolidreactantofgeneralstructurerangingfromhighlyporoustononporousmaterials.Itisshownthatthegeneralizedmodelincorporatesthegrainandporestructureforasolidpelletandcanbereducedtothegrainandrandomporemodelsasextremecases.

简介：