Concept explainers
(a)
Interpretation:
Based on the heat of hydrogenation, aromaticity of
Concept introduction:
The heat of hydrogenation depends on how many moles of
If the difference between the calculated heat of hydrogenation and the measured heat of hydrogenation of a compound is comparable to the stabilization in benzene, about
(b)
Interpretation:
Based on the heat of hydrogenation, aromaticity of Naphthalene is to be determined.
Concept introduction:
The heat of hydrogenation depends on how many moles of
If the difference between the calculated heat of hydrogenation and the measured heat of hydrogenation of a compound is comparable to the stabilization in benzene, about
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ORGANIC CHEMISTRY SG/SM PA +SQUARECAP E
- An electrostatic potential map of calicene is shown below. a) Both the electrostatic potential map and its significant dipole moment indicate that calicene is an unusually polar hydrocarbon. Which of the dipolar resonance forms, structure A or structure B, better corresponds to the electron distribution in the molecule? Select the single best answer. b) Which one of the following structures should be stabilized by resonance to a greater extent? Select the single best answer.arrow_forwardidentify which is the most and least basic among the given. refer to the number and stability of their resonance structure.arrow_forwardare these aromatic, antiaromatic, or nonaromatic? Draw in all lonepairs and indicate the orbital each lone pair resides in.arrow_forward
- draw all the resonance structures for each of the above species. be sure to include the curved arrows that indicate which pair of electrons are shifted in going from one resonance structures to the next. draw resonance hybrid of each species.arrow_forwardNH₂ Imbruvica ABBVIE WINS PHARMACYCLICS PHARMACEUTICALS: $21 billion deal helps firm become a leader in treating blood cancers UST MONTHS AFTER abandoning its $54 bil- lion bid for specialty drug maker Shire, AbbVie is shelling out $21 billion for Sunnyvale, Calif. based Pharmacyclics. The purchase furthers AbbVie's ambitions in the field of hematological cancer and re- duces its reliance on one major product. The hefty price tag is the result of heated competi- tion. "I've been through a lot of these, and I'd say this is one of the most competitive ones I've seen." AbbVie's CEO Richard A. Gonzalez said on a March 5 call with investors. Three companies were bidding against each other until the bitter end, he said. Indeed, just hours before the deal was announced, some media outlets re ported that Johnson & Johnson had won out. Pharmacyclics's key asset is Imbruvica, a BTK inhibi- tor acquired in 2006 from Celera Genomics for just 6 $2 million and some equity. FDA approved Imbravica in…arrow_forwardDraw all possible resonance structures (contributors) for the following compound. Which resonance structure contributes most to the resonance hybrid? Why?arrow_forward
- Which of the following shows correct arrow placement that represents significant resonance for the given molecule? None of the choices given represent significant resonance. Save for Laterarrow_forwardDescribe with words how you would draw the curved arrow(s) to get to the more stable resonance form for the left-hand pair. Be sure to include how many curved arrows are needed and what atom (or bond) the electrons are coming from or going to. Do the same for the resonance pair on the right-hand side. more stable more stablearrow_forward4)On the following molecules, draw the curved arrows to convert the left-hand resonance structure form to the right-hand resonance structure formarrow_forward
- Give a reasonable set of resonance structures for each compound below. Use Resonance Arrows, and curved arrows, and brackets to draw a proper set of resonance structures.arrow_forwardFor the compound shown, circle all asymmetric carbon atoms.arrow_forwardDaw the resoance sructures of following compounds. Also, draw the resonance hybrid and indicate the major contributor in the drawn resonance structures.arrow_forward
- Organic Chemistry: A Guided InquiryChemistryISBN:9780618974122Author:Andrei StraumanisPublisher:Cengage Learning