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- which one is the least stable to the most stable?What is the appropriate sequence of reagents to accomplish the following synthesis? Your answer should have the letters and or numbers in sequence with no spaces or commas (eg. af3d) Reagents a. HCI b. HBr C HO, H,SO, d. Br e. C 1. H, Pd 9 Bra. H0 h. C, H0 i Os0, then NaHSO, I HolOAc. H0 then NaBH, k BH, then HO, NaOH LO, then (CHs m. 2 equivalents of NaNH, n. H. Lindars catalyst o. Na / NH, P H,SO,. Hoso, 4 (a),BH then HO, NaOH r. 1 equivalent of NaNH, 1. CH,Br 2. CH,CH,Br 3. CH,CH,CH,Br 4. CH,CH,CH,CH,Br 5. CH,CH,CH,CH,CH,BrHomework #6, CHEM 231 Fentanyl is a synthetic opioid that is used for pain management. Fentanyl has a piperidyl ring - a 6-membered ring containing a nitrogen – in its molecular structure. Which conformation of the ring is likely to be lowest in energy (and thus most likely to bind to the opioid receptors)? Explain. A B D
- What is the relationship between the two? - enantiomers - conformers - constitutional isomers - conformers - identical - resonance formsFor the given reaction, on which side of the reaction and how many curved arrow formalisms can be drawn? CH3CH₂O-H+Na+ CNCH3CH₂O* Na+ + HCN pka = 16 pka 9.3 O Reactants, 1 arrow O Products, 1 arrow O Reactants, 2 arrows O Products, 2 arrowsDraw the compunds below. (2e,4z)-1-bromo-4-methylhexa-2,4-diene (2e,4z)-5-bromo-3-methylhexa-2,4-diene (2z,4e)-1-bromo-4-methylhexa-2,4-diene (2z,4e)-1-bromo-3-methylhexa-2,4-diene
- Which is most stable?Rank the indicated bonds in order of increasing bond dissociationenergy.6. a) For each of the following pairs of molecules, identify the stereochemical relationship. Are they enantiomers, diastereomers, constitutional isomers, or the same molecule. CH3 н— сно i) ii) CHO H3C-OH НО HO ОН CI H CI iii) iv) Br H H H CI H. Br CI CI CI b) Explain why carbocation A is formed in step 2, rather than carbocation B (formed by the mechanism shown below). A B