8. Which of the following is the most stable carbocation? Explain your answer. A) B) D) CH:CH: CH.CH CHCH,
5. Which of the molecule below gives the following 13C NMR spectrum? Explain your answer 200 300 BO 40 b) d) CHLECH.CH.CH, O -CH:CH-CH:CH HC HC CH.CH CH3CCH CH.CH 6. Which underlined hydrogen atom is the most deshielded? CHCH-CH3 (1) CH3OCHCH: (1) CICH:CH-CH3
1. Determine which of the following molecules will generate the most stable carbocation. Explain your reasoning. 2. Explain why the following reaction will not produce an E1 product? 3. Explain why the SN1 reaction condition is the preferred method rather than SN2? Determine which of the following molecules will generate the most stable carbocation. Circle the correct answer. EXPLAIN your reasoning! (5 points) Br: EXPLAIN why the following reaction will NOT produce an El product? (4 points) OH H20 Br...
5) Which of the following is the most stable carbocation (circle one)? CН C—CH, IV I. CH—С-СH СHз CHCH-8 П. CH3 -СH -CH3 V. CHз—C Ш. 6) Which of the following is the most stable diene (circlde one)? IV I. V. П. Ш.
Which of the following is the most stable carbocation with a molecular formula of C4Hg? a) b) c) d) Oaa) bb cc) d.d)
2. Carbocation stability: Rank the following carbocations from the most stable to the least stable. + (a) (b) (c) (d)
Which of the following compounds is the most stable? CH2CH3 CH2CH3 CH2CH2 CH2CHS CH.CH CHERCHE
6. Which of the four carbocations shown is the most stable (will not rearrange) and which one(s) will undergo carbocation rearrangement(s)? Indicate the correct structures of the products of the carbocation rearrangements. To practice for the exam: use resonance structures to explain why you selected specific a carbocation as the most stable. Where applicable, use the curved arrow(s) to clearly draw the mechanism of the carbocation rearrangement. HO HO A. carbocation B is most stable and will not rearrange, and...
5. Given the following: a. Determine if the carbocation is in its most stable (state most stable) and if not draw the carbocation rearrangement that could occur via a hydride or methide shift. (2 pts)
Rank the following allylic carbocations in order from least stable to most stable THEN justify your answer in words: For each of the following pairs of compounds, circle the one that is the stronger acid: Which one of the following is the MOST stable carbocation? Circle the correct answer.
Which is the most stable carbocation? Select one: Оа. b. O c.