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 Assistantissimplyasummaryoftheexperiment’squestions, 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“bent”structure?