7. Provide a MO diagram, which depicts the relative energies of the pi molecular orbitals of Cyclooctatetraene. Label each orbital. Label the HOMO and the LUMO. Show which MOs are filled in Cyclooctatetraene's ground state (A diagram will be sufficient; you do not have to draw the MOS).
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- Let us construct the molecular orbital diagram of ethylene (in pieces). a. First, construct the MO diagram of linear carbene (CH2). Draw pictures of all 6 orbitals b. Now bend the carbene to a bond angle of about 120°. How does this change your MO diagram? Draw pictures of all 6 orbitals. c. Now bring two of these carbene molecules together to make ethylene. Draw pictures of all 12 orbitals.5. Draw all five pi Molecular Orbitals of the cyclopentadienyl cation using appropriate shading. Indicate the relative energies of each MO by analyzing the number of bonding and anti bonding interactions. Label each MO as either bonding, non-bonding or antibonding. Show how the four pi electrons occupy the lowest energy MOs. Repeat with cyclopentadienyl radical (5 pi electrons) and cyclopentadienyl anion ( 6 pi electrons). Label the cyclopentadienyl cation, radical and anion as either aromatic, non aromatic or anti-aromatic. * = + or. or -5. Draw all five pi Molecular Orbitals of the cyclopentadienyl cation using appropriate shading. Indicate the relative energies of each MO by analyzing the number of bonding and anti bonding interactions. Label each MO as either bonding, non-bonding or antibonding. Show how the four pi electrons occupy the lowest energy MOs. Repeat with cyclopentadienyl radical (5 pi electrons) and cyclopentadienyl anion ( 6 pi electrons). Label the cyclopentadienyl cation, radical and anion as either aromatic, non aromatic or anti-aromatic. * = + or.or -
- 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?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?How many atoms of each hybridization state are there (sp,sp2, sp3)?What would be the result after the shown molecule is carried through the 4 step sequence? Show each intermediate and stereochemistry 1. 1eq. MeLi, then H2O workup 2.TsCl/pyr 3.NaOtBu/BuOH 4.OsO4/NaHSO3 And What is the relationship between the isomeric end products from them?
- Assign Z and E configuration to these compounds. HO HO- रुद्र 9. The following compound A is found to be less stable than compound B. Using your knowledge on the origin of angle strain and hybridization states of the carbon involved, provide an explanation for this observation. CH3 less stable than :CH2 A B 8.Choose one answer for the following. Refer to the diagram below. 1. Hybridization of atom labelled A (sp, sp2, or sp3) 2. Hybridization of atom labelled B (sp, sp2, or sp3) 3. Hybridization of atom labelled C (sp, sp2, sp3) 4.Class compound for functional group D (phenols, aryl halide, alcohols, aromatics, or carboxylic acids) 5. Class compound for functional group E (phenols, aryl halide, alcohols, aromatics, or carboxylic acids)Draw the energy diagram for cyclooctatetraene dianion , C8H8 (2-) , molecular orbitals. The polygon rule is helpful. Label each MO as bonding , antibonding, or nonbonding, and add the nonbonding line. Identify the LOMO, HOMO, LUMO and HUMO orbitals. Is this dianion aromatic , non aromatic or anti aromatic? Thank you!
- Answer the following questions for the MOs of 1,3,5-hexatriene: a. Which are bonding MOs, and which are antibonding MOs? b. Which MOs are the HOMO and the LUMO in the ground state? c. Which MOs are the HOMO and the LUMO in the excited state? d. Which MOs are symmetric, and which are antisymmetric? e. What is the relationship between HOMO and LUMO and symmetric and antisymmetric MOs?What types of orbitals overlap to provide stability to the tert-butyl carbocation ((Ch3) 3C +) by hyperconjugation: a. 2p atomic orbital of tertiary carbon plus sp2 atomic orbital of tertiary carbo b. 2p atomic orbital of tertiary carbon plus sigma C-H molecular orbital of methyl c.2p atomic orbital of tertiary carbon plus 2s C-h atomic orbital of methyl d. sp2 atomic orbital of tertiary carbon plus sigma C-H molecular orbital of methyl.Answer the following questions for the molecular orbitals (MOs) of 1,3,5,7-octatetraene: a. How many MOs does the compound have? b. Which are the bonding MOs, and which are the antibonding MOs? c. Which MOs are symmetric, and which are antisymmetric? d. Which MO is the HOMO and which is the LUMO in the ground state? e. Which MO is the HOMO and which is the LUMO in the excited state? f. What is the relationship between HOMO and LUMO and symmetric and antisymmetric orbitals? g. How many nodes does the highest-energy MO of 1,3,5,7-octatetraene have between the nuclei?
