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- 1. The following compounds or ions are aromatic. What is the Hückel number (n) for each one? Show your calculation. If more than one, give the larger n. H n = calculation1. Label the following rings as aromatic, anti-aromatic, or non-aromatic. Briefly indicate your reasoning for any molecules that are not aromatic. 2. label the hybridization at every non-metallic heteroatom. Н BrMg HN H2N. N. 'N' B. `H. Н N'Answer the following questions for the non-aromatic compound. 1. is every compound cyclic? yes or no 2. is every compound conjugated? yes or no 3. is every atom with a p-orbital connected to atoms on both sides that have a p-orbital? yes or no 4. based on the orbital drawings, are all p-orbitals in the same plane? yes or no
- Consider the molecule below (named squaric acid, for obvious reasons). Draw the product obtained when this acid is allowed to react with two equivalents of base. Draw all resonance structures of this product. Consider the molecule below (named squaric acid, for obvious reasons). Draw the product obtained when this acid is allowed to react with two equivalents of base. Draw all resonance structures of this product. .0 OH ROL C. -C-O-R + ;] 2 equiv. of base [ OH ・COR соон ARAL= coor بادةWhich of the following species is AROMATIC? (Note all species have a planar geometry) NO CH3 1 || ||| NO CH3 IV4. Explain why the protons on the sp³-hybridized carbon of propene (CH3-CH=CH₂) are more acidic than the protons on the sp²-hybridized carbons of propene, even though sp2-hybridized carbons are more electronegative than sp³-hybridized carbons. Use both structures and sentences in your answer.
- Q4. Rank the following sets of molecules according to acidity (1= most acidic).o. Opioids are compounds derived from opium, which comes from the opium poppy. Although in reality, all poppies produce opoids, the drug “morphine" , codeine as well as other opioid pain killers are typically derived from opium. A quick way to find or identify these compounds is to look for a six-membered ring containing a nitrogen. Often, if you see a six-membered ring with a nitrogen, you have some sort of an opoid or a modified synthetic pain killer. With that said, morphine and codeine are typically not injected or given orally in pure form. Instead, their salts are used, such as morphine sulfate or codeine phosphate. Why are the salts used or administered instead of the pure substances (or non-salt forms)? (I am not interested in drug names, but to have you answer the why of this question.) BIU E E E E 3回fe 27 В. acen W 1 F T F2 F3 F4 F5 F6 F7 F8 F9 F10 F11 F12 () NumLk Prt Sc Pause BrWhich of the molecules and ions given in Problem 21.15 are aromatic according to the Hckel criteria? Which, if planar, would be antiaromatic? 21.15 State the number of 2p orbital electrons in each molecule or ion.
- 14. Which of the following compounds is non-aromatic?From what we know today, what do the two Kekulé structures for benzene really represent? August Kekulé was the first person to propose a viable structure for benzene in 1865. Structures that can be separated at low enough temperatures (near absolute zero). Structures that are in a state of rapid equilibrium. O Structures that are in resonance. Structures that are conjugated trienes (--C=C--C%3DC--C3C--).ew topic [References Draw both resonance structures of the anion formed by the reaction of the most acidic C-H bond of the compound below with base. H3C SCH3 • Include all valence lone pairs in your answer. • For structures having different hydrogens of comparable acidity, assume that the reaction occurs at the less- substituted carbon. • Draw one structure per sketcher. Add additional sketchers using the drop-down menu in the bottom right corner. • Separate resonance structures using the → symbol from the drop-down menu. C P opy aste 11:58 M 18 52% 4/11/2021