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•Basicconceptsofopenchaina•Namingrulesforopenchainal•TheEnglishNamingmethodfor•Namingexercisesforopenchain•Issuestobenotedinthenami目录contentsDefinitionandPropertiesDefinitionPropertiesClassificationofopenchainaClassificationbasedoncarbonnumberOpenchainalkanescanbeclassifiedintocategoriesbasedonthenumberofcarbonatomstheycontain,suchasbutane(C4),pentane(C5),hexane(C6),etcClassificationbasedonstructureOpenchainalkanescanalsobeclassifiedintocategoriesbasedontheirstructuralcharacteristics,suchasmonosubstituted,disubstituted,andtrisubstitutedalkanesThestructuralcharacteristicsMonosubstitutedalkanes01Disubstituteddeals02Triplesubstitutedalkanes03CustomernomenclatureShortchaindealsLongchaindealsFormorethan5carbonatoms,thecustomarynomenclatureisnotsuitableSystemNamingCommonnamenamingsystem0102BasicPrinciplesofEnglishNaming1.Alkanesarenamedusingthelongestcarbonchainthatcontainsthefunctionalgroup2.Thecarbonchainisdeterminedbythefunctionalgroup,whichisthegroupthatdeterminesthereactivityofthemolecule3.ThecarbonchainisnamedusingtheappropriateprefixandsuffixtodescribethelengthandtypeofthemoleculeStepsforNaminginEnglishAnExampleAnalysisofEnglishNamingExerciseNamingExerciseCH3CH2CH2CH2CH3CH3CH(CH3)CH2CH3CH3CH2CH(CH3)CH3NamingExerciseCH3(CH3)2CH2CH3CH3CH2CH2CH(CH3)2Exercise2:NamethefollowingalkanesNamingExerciseNamingExerciseCH3(CH2)5CH3CH3(CH2)6CH3NamingExerciseNamingExercise010203NamingExercise123NamingExercise010203NamingExerciseNamingExerciseThree010203040506Toavoidfusionofisomers要点一要点二LongchainbranchedaccountsAlkaneisomernamesWhennaminglongchainbranchedaccounts,itiseasytomissthepositionofthebranchandthelengthofthemainchain,soitisnecessarytopayattentiontothecorrectdescriptionofthepositionofthebranchandthelengthofthemainchainAlkaneisomershavedifferentnames,soitisnecessarytodifferentiatethemthroughstructuralformulasandchemicalnamesPayattentiontoperiodsinnamPayattentiontotheuseofcommonEnglishwordsPayattentiontotheuseofidiomaticexpressionsIntheprocessofnaming,itisnecessarytopayattentiontotheuseofcommonEnglishwords,andavoidusingwordsthatarenotcommonlyusedorhavespecialmeansIntheprocessofnaming,itisnecessarytopayattentiontotheuseofidiomaticexpressions,andavoidusingwordsthatarenotidiomaticorhavespecialmeaningsMasteringandcorrectlyusingMasterthebasicprinciplesofEnglishnamingItisnecessarytomasterthebasicprinciplesofEnglishnaming,includingtheclassificationandcharacteristicsofchemicalinclusions,thecompositionandstructureofchemicalformulas,andthemethodsandstepsofnamingCorrectlyusethedictionaryItisnecessarytocorrectlyusethedictionary,whichcanhelpusunderstandtheaccuratemeaningandusageofwords,andavoidmisuseandmisunderstanding