雨课堂学堂在线学堂云Spectrometric Identification of Organic Compounds(燕山大学)单元测试考核答案

第1题IsUV-Visspectroscopyakindofabsorptionspectroscopy?第2题Whatisthecoverageofvisibleregion?A100nm-200nmB200nm-400nmC400nm-800nmDabove800nm第3题Theenergyofagivensegmentofspectrumisproportionaltoitswavelength.第1题TheUV-Visspectrometerweusuallyuseworksintherangeof200to800nm.

第2题AllelectronjumpscouldbeobservedbytheUV-Visspectrometerweusuallyuse.第3题Absorptionisrelatedto(

).AthestructureofthesampleBtheconcentrationofthesampleCthelengthoflightpaththroughthesampleDamountofthesolution正确答案：ABCUV-Visspectraofvariouscompounds第1题Bathochromicmeansthatabsorptionshiftstoshorterwavelength.第2题Hyperchromicmeansshiftstolowerabsorbance.第3题Themaximumabsorptionshiftstolongerwavelengthwithmoreconjugativedoublebonds.Chap1UVspectroscopy第1题AcompoundhasnoUVabsorptionintherangeof220~400nm.Whichofthefollowingcompoundsmaythecompoundbelongto?

AaromaticcompoundsBcompoundscontainingconjugateddoublebondsCaldehydesDalcohols第2题Whichofthefollowingcompoundsproducestwoabsorptionbandsinthenearultravioletregion.(

)

ApropyleneBacroleinC1,3-butadieneDButeneIntroductiontoinfraredspectroscopy第1题WilliamCoblentzisthefounderoftheinfraredspectroscopy，Whichcountrydidhecomefrom？AAmericaBJapanCFranceDGerman第2题Allgas,liquidandsolidsamplescanbemeasuredbyinfraredspectroscopy第3题Infraredspectroscopyhasverydistinctfeatures.Thenumber,location,shapeandintensityofthebandininfraredabsorption

differinthecompounds第4题Thefundamentalfrequencyabsorptionbandsofmostorganiccompoundsandinorganicionsareinthe（）

region

A

NearinfraredBmid-infraredCFarinfraredprincipleofIR第1题Bothhydrogenchlorideandnitrogenhaveinfraredabsorption第2题Thenumberofinfraredabsorptionpeaksequaltothenumberoftheoreticalvibrations.第3题Althoughbasicvibrationalfreedomoflinearcarbondioxidemoleculesis4，infact,(

)ofcarbondioxideareobservedinthemid-infraredregionAoneabsorptionpeakBtwoabsorptionpeaksCthreeabsorptionpeaksDfourabsorptionpeaks第4题The（）

or（）

oftheabsorbedphotonsandthecorrespondingabsorptionintensityarerecorded,whichformstheinfraredspectrumAwavenumberBwavelengthCchemicalshiftDm/z正确答案：ABmolecularstructureandcharacteristicgroupabsorptionfrequencyinIR(1)第1题WhatinformationrelatedtochemicalstructurecanbeobtainedfromanIRspectrum?ApositionofabsorptionpeakBabsorptionfrequencyCabsorptionintensityDshapeoftheabsorptionpeak正确答案：ABCD第2题In1-butene,theabsorptionpeakofC=Cstretchingvibrationappearsat1640cm-1,andino-xylene,theabsorptionpeakofC=Cstretchingvibrationappearsat1612cm-1molecularstructureandcharacteristicgroupabsorptionfrequencyinIR(2)第1题Whatarethefactorsthataffectthefrequencyofgroupabsorption?

Aelectroniceffectandhydrogen-bondingeffectBPhysicalstate

CEffectofsolventDEffectofcrystallinestate,crystallineformandgrainsize正确答案：ABCD第2题Generally,theparticlesizemustbesmallerthanthemeasuredwavelength.Therefore,whensolidsamplesareground,thesizeofsampleshouldbelessthan（）

μm.A2B4C6D8Samplepreparationmethod第1题Forsolidsamples,commonpreparationmethods:

AtabletpressingmethodBpastemethodCmembranemethod

正确答案：ABC第2题Forliquidsamples,common

preparationmethods:

AliquidfilmmethodBthesolution

methodCmembrane

method正确答案：ABC第3题Usually1~2mgsampleisaddedto10~20mgpotassiumbromide第4题Potassiumbromidecrystalsaretransparentanddonotabsorbinthemid-infraredregion，potassiumbromideisaverygoodcarrierandisthereforeusedasadispersantHydrocarbonandhalogenatedhydrocarbon(1)第1题ThecompoundwiththemolecularformulaofC4H6O,hasastrongultravioletabsorptionat230nm,anabsorptionpeaknear970cm-1(IR),whatkindofcompoundisit?ACH2=CH-COCH3BCH3-CH=CHCHO（Cis）CCH3-CH=CHCHO（Trans）DCH2=C(CH3)CHO第2题Theabsorptionpeakofnon-terminalcarbon-carbontriplebondalkyneisveryweak.NosignalcanbedetectedfromalkynehydrogenswingvibrationHydrocarbonandhalogenatedhydrocarbon(2)第1题If

thereisasharppeakat2120cm-1,andalkynehydrogenswingvibrationappearsat680cm-1,whatkindofcompoundisit?A2-octyneB1-hexyneC

(trans)2-hexene

D(cis)2-butene第2题If

thepeakoftwoadjacenthydrogenappearat830cm-1,Isthearomatichydrocarbon()-substituted?AmonoBorthoCmetaDparaOxygenousandnitrogenousorganics(1)第1题C－Ostretchingabsorptionisstrong,thepositionofwhichisdifferentinprimary,secondary,tertiaryalcohols,

theprimaryalcoholappearsat1050cm-1andsecondaryalcoholappearsat1100cm-1

Thetertiaryalcoholappearsat1150cm-1,phenolsappearat1230cm-1第2题IngasphaseIR,hydroxylgroupisfreestate,thepeakofhydroxylgroupisreallysharpOxygenousandnitrogenousorganics(2)第1题Thestrongpeaknear1700cm-1isthestretchingvibrationabsorptionpeakof()AHydroxylBcarbonylCaldehydeDC-O-Cabsorptionpeak第2题ν(C=O)ofamideishigherthanthatofketone.

第3题Theasymmetricstretchingvibrationofcarboxylateislocatedat()cm-1.A

1550~1630B1690-1700C1700-1740D1750-1780Applicationofinfraredspectroscopyinstructureanalysis第1题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题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正确答案：ABCEProtonMagneticResonanceSpectrometry1第1题NMRspectroscopyisapplicabletoanykindoforganicsamples.第2题NMRspectroscopyisthedefinitivemethodtoidentifymonomolecularorganiccompounds.第3题NuclearmagneticresonancewasfirstdiscoveredbyEdwardPurcellandFelixBloch.ProtonMagneticResonanceSpectrometry2第1题第2题Protonsintetramethylsilane(TMS)aremoreshieldedthanmostorganicprotons.第3题Sincetheelectronegativityofsubstituentonagroupchangesitselectrondensity,

electronegativityofsubstituentaffectsitschemicalshift.ProtonMagneticResonanceSpectrometry3第1题Couplingconstantisindependentoftheappliedmagneticfield.第2题Couplingconstantshowstheeffectivenessofthecoupling.第3题Thesimple,first-ordermultipletiscentrosymmetricwiththemostintensepeakcetral.ProtonMagneticResonanceSpectrometry4第1题The-CH3ofanethylgroupalwaysappearsatripletinNMR.第2题Ifthenumberofpeaksofacompoundin1HNMRismuchlessthanthekindsofhydrogeninthecompound,itisverylikelythatthecompoundissymmetrical.Carbon-13NMRspectromety1第1题Inthecommonlyusedcarbon-13NMRspectrum,thepeaksaresingletsmostoftime.第2题Similarto1HNMR,13Cpeakintensitiescorrelatewiththenumberofatomsaswell.第3题13Cnucleiaremuchlesssensitivethanprotons.Carbon-13NMRspectromety2第1题In13CNMR,coincidencesareuncommon.第2题"Chemicalshiftequivalence"resultsfrominterchangeabilitybysymmetryorarapidmechanism.Two-dimensionalNMRSpectrometry1第1题1H-1HCOSYdeterminessignalarisingfromneighboringprotonsthroughbonds.第2题In1H-1HCOSY,bothdimensionscorrespondtotheprotonNMRspectra.第3题COSYisveryusefulespeciallywhenelucidating3Dstructures.Two-dimensionalNMRSpectrometry2第1题BothofHMQCandHMBCareheteronuclearcorrelationspectroscopybetweenprotonandcarbon.第2题HMBCdetectscorrelationsofattached1H-13C.第3题TherearealwaysmorecorrelationsinHMQCthanHMBC.Introductionofmassspectrometry第1题Whatarethecomponentsofamassspectrometer?AvacuumsystemBsampleintroductionCIonizationsourceDMassanalyzerEDetectorFRecorder正确答案：ABCDEF第2题Lookatthemassspectrumof3-hexanone,whichpeakisthebasepeakandwhatisitsmasschargeratio?

Am/z=29Bm/z=43Cm/z=57Dm/z=71Typicaliontypes第1题Foracompound,them/zofthemolecularionis120,andthem/zofonefragmentionis105.Whatisthem/zofthemetastableion?A120B105C91.9D137.1第2题ThefollowingcompoundscontainC,HorO,N,trytoanalyzewhichcompound’smolecularioniswithm/zofanoddnumber.AC6H6BC6H5NO2CC4H2N6ODC9H10O2Fragmentationoforganicions第1题Inthemassspectrumofbutanone,whatkindofcleavageleadingtothefragmentionwithm/zof29?Aα-cleavageBi-cleavageCγ-HtransferDrearrangement第2题Inthemassspectrumofbutylbenzene,thepeakswithm/zof134,91and92aredueto(),(),and()processes,respectively.AThemoleculelosesanelectron,

i-cleavage,

α-cleavageBThemoleculelosesanelectron，α-cleavage，McLaffertyrearrangementCi-cleavage,

α-cleavage，themoleculelosesanelectronDMcLaffertyrearrangement,

i-cleavage,

α-cleavage正确答案：BHydrocarbons第1题AcompoundwithmolecularformulaofC8H10,andthereisastrongpeakwithm/zof91initsmassspectrum,thenthecompoundcouldbe（）AtolueneBethylbenzeneCP-dimethylbenzeneDO-dimethylbenzene第2题Themassspectrumofacompoundisshownasfollows,themolecularweightofthecompoundis142,thenthiscompoundcouldbe（）A2,6-dimethyloctaneBn-decaneC4,4-dimethyloctaneD3-methylnonaneHydroxylcompounds-ketones第1题Regardingthestabilityofmolecularions,inwhichorderthefollowingcompoundsarearrangedcorrectly?AConjugatedalkenes>benzene>alcohols>ketoneBBenzene>conjugatedalkenes>ketones>alcoholsCBenzene>ketone>conjugatedalkenes>alcoholsDBenzene>conjugatedalkenes>alcohols>ketones第2题Inthemassspectrumisof2-pentanone,themainstrongpeakis（）Am/z=29Bm/z=43Cm/z=71Dm/z=15Aldehydes-Compoundswithotherheteroatoms第1题Forbromideethane,Bratomcancontributetothefollowingionpeaks（）AMandM+2BMCM+2DM+1第2题For3-bromidepropane,therelativeintensityratioofmolecularionpeakMtoM+2peakis（）A1:1B1:2C1:3D2:1FundamentalsofMassSpectrometryAnalysis第1题InLCMS,thecommonlyusedionsourcesareESIandAPCI第2题EIcaneasilyobtainalargenumberoffragmentionsinGCMS,whichisbeneficialforelucidatingthestructureofunknownsubstances.Stepsofmassspectrometryanalysis第1题Whichofthefollowingfragmentpeakisimpossibleundernormalmassspectrometryconditions?AM-18BM-8CM+2DM-2第2题Whatkindofthefollowingfragmentscouldgiveionpeakwithm/zof43?AC3H7BCH3COCCH2CH2NH2DCH3CHO正确答案：ABCasestudy第1题Inthemassspectrumofanester(M=116),thereareionpeakswithm/zof57(100%),29(27%)and43(27%),sothestructureofthecompoundis（）ACH3COO(CH2)3CH3BCH3(CH2)3COOCH3CCH3CH2COOCH2CH2CH3D(CH3)2CHCOOC2H5第2题Inthemassspectrumofacompound,therearepeakswithm/zof59(basepeak),31,andweakpeakswithm/zof73，87and102,thechemicalformulaisC6H14O，therefore,thecompoundcouldbe（）AdipropyletherBn-hexanolC2-hexanolDethylb