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[References]
Draw a structure for 4-
methyl-1,2-
pentadiene.
Visited
• Show
stereochemistry
only if given in
e name.
. Do not show
stereochemistry
in other cases.
• If a group is
achiral, do not
use wedged or
hashed bonds
on it.
• Include H atoms
at chiral centers
only.
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- How many H-H eclipsing were planar.assume energy cost of 4.0 interaction would be present f cyclopentanekj/mol for each eclipsing interaction how much torsionl strane of woud planar cyclopentane have .since the measured totl strane of cyclopentane is 26kj/mol .how much torsional strain is revealed by puckering?Indetify the molecule that is (2S,3R)-3-chloro-2-methylbutan-1,2-ol. (A, B, C or D)a) Predict the major product of the reaction and identify the type of reaction (substitution or addition). Explain the function of Pt used in the reaction. (with First image) b) Write the reaction of the mononitration of chlorobenzene and predict the major products with reasons. c) Identify all the carbon atoms in the following compounds that are sp2 (Circle the carbon(s) your selected on image two)
- Indicate the relationship between each pair. Choose from: configurational stereoisomers,conformers, constitutional isomers, or different formulas (Each term is used at least twice.)Build a model of methylcyclohexane, and use the model to complete the following Newmanprojections of methylcyclohexane in the chair conformation: a. When the methyl group is in an axial or equatorial (circle one) position, the molecule is inits lowest potential energy conformation. b. Label one Newman projection above anti and the other gauche to describe the relationshipbetween the methyl group and C3 of the ring. c. In general, which is a lower PE conformation, anti or gauche? d. Explain how your answer to b and c provide an explanation for why it is more favorable fora large group to be in an equatorial than an axial position.(a) Draw the molecular orbital picture for propa-1,2-diene, H2C=C=CH2. Hint: The three-dimensional geometry is shownin the chapter. (b) Draw the MO energy diagram for propa-1,2-diene. What is the HOMO? What is the LUMO?
- Answer the following questions for the MOs of 1,3-butadiene: a. Which are pie bonding MOs, and which are p* antibonding MOs? b. Which MOs are symmetric, and which are antisymmetric? c. Which MO is the HOMO and which is the LUMO in the ground state? d. Which MO is the HOMO and which is the LUMO in the excited state? e. What is the relationship between the HOMO and the LUMO and symmetric and antisymmetric orbitals?Which is/are correct? a.The dipole moment of propanal is greater than that of 1-butene. b.Carbonyl compounds are more soluble in water than the corresponding alkanes but less than the corresponding alcohols. c.All the choices. d.The boiling points of 2-propanol, propanone, and 2-methylpropene are 82C, 57C, and -7C, respectively.Explain why alkene A is more stable than alkene B, even though Bcontains more carbon atoms bonded to the double bond. Would youexpect C to be more or less stable than A and B?
- For each of the following perrs what relationships exist between the two structures?Identify and describe mistake(s) in the following structures.Answer the following questions for the MOs of 1,3-butadiene: a. Which are p bonding MOs, and which are p* antibonding MOs? b. Which MOs are symmetric, and which are antisymmetric? c. Which MO is the HOMO and which is the LUMO in the ground state? d. Which MO is the HOMO and which is the LUMO in the excited state? e. What is the relationship between the HOMO and the LUMO and symmetric and antisymmetric orbitals?