Organic structures shapes and isomerism part 2

Organic Structures Shapes and Isomerism Part 2

Kathy Carrigan

Version 42-0185-00-01

 

Lab Report Assistant                                                                                                 

 

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

 

 

 

Questions                                                                                                                             

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.

 

 

 

 

 

 

 

 

 

 

 

 

 

Names

 

Are these structures isomers?                                 If so what type?                                     

 

 

 

 

 

 

CH3


CH3

 

CH


 

 

 

CH3


 

 

 

CH3


 

 

CH2      CH2


 

 

CH3

 

 

 

 

Names

 

Are these structures isomers?                                 If so what type?                                     

 

 

 

Cl                                      Cl         Cl

 

CH3     CH

 

Cl


CH2


and


CH3     CH


CH2

 

 

 

Names

 

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“bentstructure?

 

 

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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