雨課堂學(xué)堂在線學(xué)堂云Spectrometric Identification of Organic Compounds(燕山大學(xué))單元測試考核答案_第1頁
雨課堂學(xué)堂在線學(xué)堂云Spectrometric Identification of Organic Compounds(燕山大學(xué))單元測試考核答案_第2頁
雨課堂學(xué)堂在線學(xué)堂云Spectrometric Identification of Organic Compounds(燕山大學(xué))單元測試考核答案_第3頁
雨課堂學(xué)堂在線學(xué)堂云Spectrometric Identification of Organic Compounds(燕山大學(xué))單元測試考核答案_第4頁
雨課堂學(xué)堂在線學(xué)堂云Spectrometric Identification of Organic Compounds(燕山大學(xué))單元測試考核答案_第5頁
已閱讀5頁,還剩10頁未讀, 繼續(xù)免費閱讀

下載本文檔

版權(quán)說明:本文檔由用戶提供并上傳,收益歸屬內(nèi)容提供方,若內(nèi)容存在侵權(quán),請進(jìn)行舉報或認(rèn)領(lǐng)

文檔簡介

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

溫馨提示

  • 1. 本站所有資源如無特殊說明,都需要本地電腦安裝OFFICE2007和PDF閱讀器。圖紙軟件為CAD,CAXA,PROE,UG,SolidWorks等.壓縮文件請下載最新的WinRAR軟件解壓。
  • 2. 本站的文檔不包含任何第三方提供的附件圖紙等,如果需要附件,請聯(lián)系上傳者。文件的所有權(quán)益歸上傳用戶所有。
  • 3. 本站RAR壓縮包中若帶圖紙,網(wǎng)頁內(nèi)容里面會有圖紙預(yù)覽,若沒有圖紙預(yù)覽就沒有圖紙。
  • 4. 未經(jīng)權(quán)益所有人同意不得將文件中的內(nèi)容挪作商業(yè)或盈利用途。
  • 5. 人人文庫網(wǎng)僅提供信息存儲空間,僅對用戶上傳內(nèi)容的表現(xiàn)方式做保護(hù)處理,對用戶上傳分享的文檔內(nèi)容本身不做任何修改或編輯,并不能對任何下載內(nèi)容負(fù)責(zé)。
  • 6. 下載文件中如有侵權(quán)或不適當(dāng)內(nèi)容,請與我們聯(lián)系,我們立即糾正。
  • 7. 本站不保證下載資源的準(zhǔn)確性、安全性和完整性, 同時也不承擔(dān)用戶因使用這些下載資源對自己和他人造成任何形式的傷害或損失。

評論

0/150

提交評論