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第1題IsUV-Visspectroscopyakindofabsorptionspectroscopy?第2題Whatisthecoverageofvisibleregion?A100nm-200nmB200nm-400nmC400nm-800nmDabove800nm第3題Theenergyofagivensegmentofspectrumisproportionaltoitswavelength.第1題TheUV-Visspectrometerweusuallyuseworksintherangeof200to800nm.
第2題AllelectronjumpscouldbeobservedbytheUV-Visspectrometerweusuallyuse.第3題Absorptionisrelatedto(
).AthestructureofthesampleBtheconcentrationofthesampleCthelengthoflightpaththroughthesampleDamountofthesolution正確答案:ABCUV-Visspectraofvariouscompounds第1題Bathochromicmeansthatabsorptionshiftstoshorterwavelength.第2題Hyperchromicmeansshiftstolowerabsorbance.第3題Themaximumabsorptionshiftstolongerwavelengthwithmoreconjugativedoublebonds.Chap1UVspectroscopy第1題AcompoundhasnoUVabsorptionintherangeof220~400nm.Whichofthefollowingcompoundsmaythecompoundbelongto?
AaromaticcompoundsBcompoundscontainingconjugateddoublebondsCaldehydesDalcohols第2題Whichofthefollowingcompoundsproducestwoabsorptionbandsinthenearultravioletregion.(
)
ApropyleneBacroleinC1,3-butadieneDButeneIntroductiontoinfraredspectroscopy第1題WilliamCoblentzisthefounderoftheinfraredspectroscopy,Whichcountrydidhecomefrom?AAmericaBJapanCFranceDGerman第2題Allgas,liquidandsolidsamplescanbemeasuredbyinfraredspectroscopy第3題Infraredspectroscopyhasverydistinctfeatures.Thenumber,location,shapeandintensityofthebandininfraredabsorption
differinthecompounds第4題Thefundamentalfrequencyabsorptionbandsofmostorganiccompoundsandinorganicionsareinthe()
region
A
NearinfraredBmid-infraredCFarinfraredprincipleofIR第1題Bothhydrogenchlorideandnitrogenhaveinfraredabsorption第2題Thenumberofinfraredabsorptionpeaksequaltothenumberoftheoreticalvibrations.第3題Althoughbasicvibrationalfreedomoflinearcarbondioxidemoleculesis4,infact,(
)ofcarbondioxideareobservedinthemid-infraredregionAoneabsorptionpeakBtwoabsorptionpeaksCthreeabsorptionpeaksDfourabsorptionpeaks第4題The()
or()
oftheabsorbedphotonsandthecorrespondingabsorptionintensityarerecorded,whichformstheinfraredspectrumAwavenumberBwavelengthCchemicalshiftDm/z正確答案:ABmolecularstructureandcharacteristicgroupabsorptionfrequencyinIR(1)第1題WhatinformationrelatedtochemicalstructurecanbeobtainedfromanIRspectrum?ApositionofabsorptionpeakBabsorptionfrequencyCabsorptionintensityDshapeoftheabsorptionpeak正確答案:ABCD第2題In1-butene,theabsorptionpeakofC=Cstretchingvibrationappearsat1640cm-1,andino-xylene,theabsorptionpeakofC=Cstretchingvibrationappearsat1612cm-1molecularstructureandcharacteristicgroupabsorptionfrequencyinIR(2)第1題Whatarethefactorsthataffectthefrequencyofgroupabsorption?
Aelectroniceffectandhydrogen-bondingeffectBPhysicalstate
CEffectofsolventDEffectofcrystallinestate,crystallineformandgrainsize正確答案:ABCD第2題Generally,theparticlesizemustbesmallerthanthemeasuredwavelength.Therefore,whensolidsamplesareground,thesizeofsampleshouldbelessthan()
μm.A2B4C6D8Samplepreparationmethod第1題Forsolidsamples,commonpreparationmethods:
AtabletpressingmethodBpastemethodCmembranemethod
正確答案:ABC第2題Forliquidsamples,common
preparationmethods:
AliquidfilmmethodBthesolution
methodCmembrane
method正確答案:ABC第3題Usually1~2mgsampleisaddedto10~20mgpotassiumbromide第4題Potassiumbromidecrystalsaretransparentanddonotabsorbinthemid-infraredregion,potassiumbromideisaverygoodcarrierandisthereforeusedasadispersantHydrocarbonandhalogenatedhydrocarbon(1)第1題ThecompoundwiththemolecularformulaofC4H6O,hasastrongultravioletabsorptionat230nm,anabsorptionpeaknear970cm-1(IR),whatkindofcompoundisit?ACH2=CH-COCH3BCH3-CH=CHCHO(Cis)CCH3-CH=CHCHO(Trans)DCH2=C(CH3)CHO第2題Theabsorptionpeakofnon-terminalcarbon-carbontriplebondalkyneisveryweak.NosignalcanbedetectedfromalkynehydrogenswingvibrationHydrocarbonandhalogenatedhydrocarbon(2)第1題If
thereisasharppeakat2120cm-1,andalkynehydrogenswingvibrationappearsat680cm-1,whatkindofcompoundisit?A2-octyneB1-hexyneC
(trans)2-hexene
D(cis)2-butene第2題If
thepeakoftwoadjacenthydrogenappearat830cm-1,Isthearomatichydrocarbon()-substituted?AmonoBorthoCmetaDparaOxygenousandnitrogenousorganics(1)第1題C-Ostretchingabsorptionisstrong,thepositionofwhichisdifferentinprimary,secondary,tertiaryalcohols,
theprimaryalcoholappearsat1050cm-1andsecondaryalcoholappearsat1100cm-1
Thetertiaryalcoholappearsat1150cm-1,phenolsappearat1230cm-1第2題IngasphaseIR,hydroxylgroupisfreestate,thepeakofhydroxylgroupisreallysharpOxygenousandnitrogenousorganics(2)第1題Thestrongpeaknear1700cm-1isthestretchingvibrationabsorptionpeakof()AHydroxylBcarbonylCaldehydeDC-O-Cabsorptionpeak第2題ν(C=O)ofamideishigherthanthatofketone.
第3題Theasymmetricstretchingvibrationofcarboxylateislocatedat()cm-1.A
1550~1630B1690-1700C1700-1740D1750-1780Applicationofinfraredspectroscopyinstructureanalysis第1題theformulaofacompoundisC6H12,accordingtotheinfraredspectrum,theabsorptionpeaksareat3030,2962,2853,1670,1458,1380,1360,970cm-1,pleasespeculatestructure.A(E)4-methyl-2-penteneB(Z)4-methyl-2-pentene第2題Pleaseassignthelabeledpeaksintheinfraredspectrumofphenylacetylene,3291,3081,2110,757and692cm-1A3291cm-1-
StretchingvibrationabsorptionofC-Hon
C≡CHB3081cm-1-
ThestretchingvibrationofC-HonbenzeneringC2110cm-1-
Thestretchingvibrationof
C≡CD757and692cm-1
:Out-of-planebendingvibrationofC-Hon
para-
substitutedbenzeneringE757and692cm-1
:Out-of-planebendingvibrationofC-Honmono-substitutedbenzenering正確答案:ABCEProtonMagneticResonanceSpectrometry1第1題NMRspectroscopyisapplicabletoanykindoforganicsamples.第2題NMRspectroscopyisthedefinitivemethodtoidentifymonomolecularorganiccompounds.第3題NuclearmagneticresonancewasfirstdiscoveredbyEdwardPurcellandFelixBloch.ProtonMagneticResonanceSpectrometry2第1題第2題Protonsintetramethylsilane(TMS)aremoreshieldedthanmostorganicprotons.第3題Sincetheelectronegativityofsubstituentonagroupchangesitselectrondensity,
electronegativityofsubstituentaffectsitschemicalshift.ProtonMagneticResonanceSpectrometry3第1題Couplingconstantisindependentoftheappliedmagneticfield.第2題Couplingconstantshowstheeffectivenessofthecoupling.第3題Thesimple,first-ordermultipletiscentrosymmetricwiththemostintensepeakcetral.ProtonMagneticResonanceSpectrometry4第1題The-CH3ofanethylgroupalwaysappearsatripletinNMR.第2題Ifthenumberofpeaksofacompoundin1HNMRismuchlessthanthekindsofhydrogeninthecompound,itisverylikelythatthecompoundissymmetrical.Carbon-13NMRspectromety1第1題Inthecommonlyusedcarbon-13NMRspectrum,thepeaksaresingletsmostoftime.第2題Similarto1HNMR,13Cpeakintensitiescorrelatewiththenumberofatomsaswell.第3題13Cnucleiaremuchlesssensitivethanprotons.Carbon-13NMRspectromety2第1題In13CNMR,coincidencesareuncommon.第2題"Chemicalshiftequivalence"resultsfrominterchangeabilitybysymmetryorarapidmechanism.Two-dimensionalNMRSpectrometry1第1題1H-1HCOSYdeterminessignalarisingfromneighboringprotonsthroughbonds.第2題In1H-1HCOSY,bothdimensionscorrespondtotheprotonNMRspectra.第3題COSYisveryusefulespeciallywhenelucidating3Dstructures.Two-dimensionalNMRSpectrometry2第1題BothofHMQCandHMBCareheteronuclearcorrelationspectroscopybetweenprotonandcarbon.第2題HMBCdetectscorrelationsofattached1H-13C.第3題TherearealwaysmorecorrelationsinHMQCthanHMBC.Introductionofmassspectrometry第1題Whatarethecomponentsofamassspectrometer?AvacuumsystemBsampleintroductionCIonizationsourceDMassanalyzerEDetectorFRecorder正確答案:ABCDEF第2題Lookatthemassspectrumof3-hexanone,whichpeakisthebasepeakandwhatisitsmasschargeratio?
Am/z=29Bm/z=43Cm/z=57Dm/z=71Typicaliontypes第1題Foracompound,them/zofthemolecularionis120,andthem/zofonefragmentionis105.Whatisthem/zofthemetastableion?A120B105C91.9D137.1第2題ThefollowingcompoundscontainC,HorO,N,trytoanalyzewhichcompound’smolecularioniswithm/zofanoddnumber.AC6H6BC6H5NO2CC4H2N6ODC9H10O2Fragmentationoforganicions第1題Inthemassspectrumofbutanone,whatkindofcleavageleadingtothefragmentionwithm/zof29?Aα-cleavageBi-cleavageCγ-HtransferDrearrangement第2題Inthemassspectrumofbutylbenzene,thepeakswithm/zof134,91and92aredueto(),(),and()processes,respectively.AThemoleculelosesanelectron,
i-cleavage,
α-cleavageBThemoleculelosesanelectron,α-cleavage,McLaffertyrearrangementCi-cleavage,
α-cleavage,themoleculelosesanelectronDMcLaffertyrearrangement,
i-cleavage,
α-cleavage正確答案:BHydrocarbons第1題AcompoundwithmolecularformulaofC8H10,andthereisastrongpeakwithm/zof91initsmassspectrum,thenthecompoundcouldbe()AtolueneBethylbenzeneCP-dimethylbenzeneDO-dimethylbenzene第2題Themassspectrumofacompoundisshownasfollows,themolecularweightofthecompoundis142,thenthiscompoundcouldbe()A2,6-dimethyloctaneBn-decaneC4,4-dimethyloctaneD3-methylnonaneHydroxylcompounds-ketones第1題Regardingthestabilityofmolecularions,inwhichorderthefollowingcompoundsarearrangedcorrectly?AConjugatedalkenes>benzene>alcohols>ketoneBBenzene>conjugatedalkenes>ketones>alcoholsCBenzene>ketone>conjugatedalkenes>alcoholsDBenzene>conjugatedalkenes>alcohols>ketones第2題Inthemassspectrumisof2-pentanone,themainstrongpeakis()Am/z=29Bm/z=43Cm/z=71Dm/z=15Aldehydes-Compoundswithotherheteroatoms第1題Forbromideethane,Bratomcancontributetothefollowingionpeaks()AMandM+2BMCM+2DM+1第2題For3-bromidepropane,therelativeintensityratioofmolecularionpeakMtoM+2peakis()A1:1B1:2C1:3D2:1FundamentalsofMassSpectrometryAnalysis第1題InLCMS,thecommonlyusedionsourcesareESIandAPCI第2題EIcaneasilyobtainalargenumberoffragmentionsinGCMS,whichisbeneficialforelucidatingthestructureofunknownsubstances.Stepsofmassspectrometryanalysis第1題Whichofthefollowingfragmentpeakisimpossibleundernormalmassspectrometryconditions?AM-18BM-8CM+2DM-2第2題Whatkindofthefollowingfragmentscouldgiveionpeakwithm/zof43?AC3H7BCH3COCCH2CH2NH2DCH3CHO正確答案:ABCasestudy第1題Inthemassspectrumofanester(M=116),thereareionpeakswithm/zof57(100%),29(27%)and43(27%),sothestructureofthecompoundis()ACH3COO(CH2)3CH3BCH3(CH2)3COOCH3CCH3CH2COOCH2CH2CH3D(CH3)2CHCOOC2H5第2題Inthemassspectrumofacompound,therearepeakswithm/zof59(basepeak),31,andweakpeakswithm/zof73,87and102,thechemicalformulaisC6H14O,therefore,thecompoundcouldbe()AdipropyletherBn-hexanolC2-hexanolDethylb
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