Using these drawings, convince yourself that the Woodward-Hoffmann rules in the
ID: 504673 • Letter: U
Question
Using these drawings, convince yourself that the Woodward-Hoffmann rules in the table below are valid.
Check all that apply.
WoodwardHoffmann Rules for Electrocyclic Reactions Number of conjugated bonds Reaction conditions Allowed mode of ring closure Even number Thermal Conrotatory Photochemical Disrotatory Odd number Thermal Disrotatory Photochemical Conrotatory Part B Using these drawings, convince yourself that the Woodward-Hoffmann rules in the table below are valid Woodward Hoffmann Rules for Electrocyclic Reactions Number of conjugated Tr bonds Reaction conditions Allowed mode of ring closure Thermal Conrotatory Even number Photochemical Disrotatory Thermal Disrotatory Odd number Photochemical Con rotatory Check all that apply. If under thermal conditions the polyene has an even number of double bonds, conrotatory ring closure will result in in- hase overlap of the terminal p orbitals in the HOMO. If under thermal conditions the polyene has an even number of double bonds, disrotatory ring closure will result in ase overlap of the terminal p orbitals in the HOMO. If under thermal conditions the polyene has an odd number of double bonds, conrotatory ring closure will result in in-phase overlap of the terminal p orbitals in the HOMO If under thermal conditions the polyene has an odd number of double bonds, disrotatory ring closure wi result in in-phase overlap of the tenminal porbitals in the HoMO. lf under photochemical conditions the polyene has an even number of double bonds, disrotatory ing closure will result in ase overlap of the terminal p orbitals in the LUMO lf under photochemical conditions the polyene has an odd number of double bonds, conrotatory ring closure wi result in in-phase overlap of the terminal p orbitals i the LUMO If under photochemical conditions the polyene has an even number of double bonds, conrotatory ring closure will result in in-phase overlap of the terminal p orbitals in the LUMO. lf under photochemical conditions the polyene has an odd number of double bonds, disrotatory ring closure wi result in in-phase overlap of the terminal p orbitals in the LUMO.Explanation / Answer
Even number - Thermal - Conrotatory
If under thermal conditions the polyene has an even number of double bonds, conrotatory ring closure will result in in-phase overlap of the terminal p orbitals in the HOMO.
Odd number - Thermal - Disrotatory
If under thermal conditions the polyene has an odd number of double bonds, disrotatory ring closure will result in in-phase overlap of the terminal p orbitals in the HOMO.
Even number - Photochemical - Disrotatory
If under photochemical conditions the polyene has an even number of double bonds, disrotatory ring closure will result in in-phase overlap of the terminal p orbitals in the LUMO.
Odd number - Photochemical - Conrotatory
If under photochemical conditions the polyene has an odd number of double bonds, conrotatory ring closure will result in in-phase overlap of the terminal p orbitals in the LUMO.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.