13.28 Draw all resonance structures of the radical that results from abstraction of a hydrogen atom from the antioxidant BHA (butylated hydroxy anisole). Abstract H from -OH, not from CH. BHA
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- Write out the two-step sequence that converts benzene to each compound.Draw all reasonable resonance contributors for the moleculeThis structure is considered to have 'anti-aromatic character'. Using the provided resonance structures, draw the curved electron-pushing arrows to show the interconversion between resonance hybrid contributors. Be sure to account for all bond-breaking and bond-making steps. :0: Select to Add Arrows :0: I I I I
- a.How many π electrons does C contain? b.How many π electrons are delocalized in the ring? c.Explain why C is aromatic.Please help with both questionsResveratrol is an antioxidant found in the skin of red grapes. Its anticancer, anti-inammatory, and various cardiovascular effects are under active investigation. (a) Draw all resonance structures for the radical that results from homolysis of the OH bond shown in red. (b) Explain why homolysis of this OH bond is preferred to homolysis of either OH bond in the other benzene ring.
- The purine heterocycle occurs commonly in the structure of DNA. a. How is each N atom hybridized? b. In what type of orbital does each lone pair on a N atom reside? c. How many a electrons does purine contain? d. Why is purine aromatic? purineWhich compound is not aromatic? A. only A and D B. A, B and C C. only B D. only AProblem 5.27 (a) Label the four stereogenic centers in sorbitol as R or S. (b) How are sorbitol and A related? (c) How are sorbitol and B related? HO H HO H но н но н Н Он Н ОН HO HO но но но н он Н ОН B H OH HO H HO H HO H sorbitol A