Organic structures shapes and isomerism

Homework Essay Help: Organic Structures Shapes and Isomerism Part 2

Kathy Carrigan

Version 42-0185-00-01


Lab Report Assistant                                                                                                 


Thisdocumentisnotmeanttobeasubstitute foraformallaboratoryreport.TheLabReport Assistantissimplyasummaryoftheexperiment’squestions, diagramsifneeded,anddatatables thatshouldbeaddressedinaformallabreport.Theintentistofacilitatestudents’writing oflab reports by providing this informationin an editable filewhich can be sent to an instructor.





Part I Section1


A.  Wouldthestructuresyouhaveproducedinstep1beconsideredisomersofoneanother? Explain thebasis foryouranswer.



B.   Whatarethebond angles and molecular geometryaroundthecarbonatoms?




Part I Section2


A.  Is this possible with thedouble bond? Describewhatyousee.



B.   Whatis thebond angle and molecular geometryaroundthe2middle carbonatoms?




Part I Section3


A.  Whatarethebond angles and molecular geometryaroundthedouble bonded carbons?



B.   Canyourcis-2-butenemodelbeconvertedintothetrans-2-butenemodelwithoutbreaking bonds?



C.   The cis- and trans-2-butenesarecalledgeometricisomers.Whyaretheygiventhis name?



D.  Definethetermstructuralisomer(seeOrganicStructuresPart1)andexplainhowitdiffers

froma geometricisomer.


Part I Challenge Questions(required)


Indicate  whethereachof  the  following  compound  pairs  are  geometric  isomers,  structural isomers, or not isomers atall. Writethenamesforthecompoundsunder each formula.
















Are these structures isomers?                                 If so what type?                                     





















CH2      CH2










Are these structures isomers?                                 If so what type?                                     




Cl                                      Cl         Cl


CH3     CH








CH3     CH








Are these structures isomers?                                 If so what type?                                     


PartII:AromaticHydrocarbons and Resonance


A.  Whatis thegeometryof eachof thecarbonsin benzene?



B.   Draw the structural formula for methylbenzene. (Note: draw the structure using the drawing programandpasteitinhere.Wedonotwant you toscaninthisasapdffile.If youareunable to draw the structure skip it and answer the rest of the question.)













Part III: Alkynes


A.  Constructa model of 1-propyneand drawits structuralformula.













Part IV: FunctionalGroups


Part IV Section1


A.  Constructamodel,usingtheredatomwithtwoprongsforoxygen,thendrawthestructural formulafor1-propanol,C3H7OH.  (Thecommonnameispropanol,orpropylalcohol)Whyis oxygenrepresentedbythe“bent”structure?


B.   Constructamodel,thendrawthestructuralformulafor2-propanol,C3H7OH.(Thecommon name is isopropanol, or isopropyl alcohol).













Part IV Section2


A.  Construct a model, then draw the structural formula for dimethyl ether, C2H6O.




















B.   Whatrelationshipexistsbetweenethanol,C2H6O,anddimethylether?   Youmayneedto

draw/constructa model of ethanoltoseethis.

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