The pentadienyl radical, H2C“CH¬CH“CH¬CH2#, has its unpaired electron delocalized over three carbon atoms. How many nodes are there in the lowest-energy MO of the pentadienyl system? How many in the highest-energy MO?
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The pentadienyl radical, H2C“CH¬CH“CH¬CH2
#
, has its unpaired electron delocalized over three carbon atoms.
How many nodes are there in the lowest-energy MO of the pentadienyl system? How many in the highest-energy MO?
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- The pentadienyl radical, H2C“CH¬CH“CH¬CH2#, has its unpaired electron delocalized over three carbon atoms.(a) Use resonance forms to show which three carbon atoms bear the unpaired electron.(b) How many MOs are there in the molecular orbital picture of the pentadienyl radical?(c) How many nodes are there in the lowest-energy MO of the pentadienyl system? How many in the highest-energy MO?(d) Draw the MOs of the pentadienyl system in order of increasing energy. (continued)762 CHAPTER 15 Conjugated Systems, Orbital Symmetry, and Ultraviolet Spectroscopy(e) Show how many electrons are in each MO for the pentadienyl radical (ground state).(f) Show how your molecular orbital picture agrees with the resonance picture showing delocalization of the unpairedelectron onto three carbon atoms.(g) Remove the highest-energy electron from the pentadienyl radical to give the pentadienyl cation. Which carbon atomsshare the positive charge? Does this picture agree with the resonance picture?(h) Add an…The pentadienyl radical, H2C“CH¬CH“CH¬CH2#, has its unpaired electron delocalized over three carbon atoms.(a) Use resonance forms to show which three carbon atoms bear the unpaired electron.(b) How many MOs are there in the molecular orbital picture of the pentadienyl radical?(c) How many nodes are there in the lowest-energy MO of the pentadienyl system? How many in the highest-energy MO?(d) Draw the MOs of the pentadienyl system in order of increasing energyThe pentadienyl radical, H2C“CH¬CH“CH¬CH2#, has its unpaired electron delocalized over three carbon atoms.(a) Use resonance forms to show which three carbon atoms bear the unpaired electron.(b) How many MOs are there in the molecular orbital picture of the pentadienyl radical?
- Describe the occupied π molecular orbitals in the ground state of cyclobutadieneThe unsaturation number or degree of unsaturation (U) can be used to determine the number of rings and multiple bonds in a compound from its molecular formula. Given a structure, you can determine the number of hydrogens without having to count them explicitly. Consider three compounds and their degree of unsaturation. (a) A compound A has the molecular formula C7H13ClN2OC7H13ClN2O. How many rings and/or π bonds does it contain?4) How many nodes, other than the node coincident with the molecular plane, are found in the highest energy л MO of 1,3-butadiene?
- Show how to construct the molecular orbitals of ethylene, butadiene, and the allylicsystem. Show the electronic configurations of ethylene, butadiene, and the allylcation, radical, and anion.Sketch the ultraviolet absorption spectrum of 1,3-Butadiene, matching peaks to electronic transitions. show that four isolated p orbital on carbon atoms combine to form pi orbitalAromatic compounds must have a p orbital on every atom in the ring. Define this ?
- 7 The pentadienyl radical, H2C“CH¬CH“CH¬CH2#, has its unpaired electron delocalized over three carbon atoms.(a) Use resonance forms to show which three carbon atoms bear the unpaired electron.Using Hydrogenation Data to Determine the Number of Rings and π Bonds in a Molecule How many rings and π bonds are contained in a compound of molecular formula C8H12 that is hydrogenated to a compound of molecular formula C8H14?If we extend the formation of the four pi-molecular orbitals to forming pi-molecular orbitals by the combination of the six un-hybridized p-orbitals in 1,3,5-hexatriene? Among those pi- molecular orbitals for 1,3,5-hexatriene, how many electrons are in the lowest-enery pi- molecular orbital? 1,3,5-hexatriene