Organic Chemistry 2. This is our study guide and I need the right answers, so I

Question

Organic Chemistry 2. This is our study guide and I need the right answers, so I know that i am actually getting the correct answer when I work them out. I do not need any explaination, just the correct answer. thank you

OH 21. What reagent can convert 11 to a compound with a pKa of 97 A) NaOH B) LDA C) LiAlH4 D) CrO3/H2S04 OH 22. When cyclopentanone reacts as shown in this scheme, what are the respective products from pathways i and ii? A) nitrile and imine B) alcohol and enamne C) imine and enamine D) imine and new ketone 23. For this scheme, what is the purpose of step #4? 1. NaOEt 2. CH3C2CH2Br 3. KOH A) decaboxylation B) converting the ester to a carboylic acid C) making a new carbon-carbon bond D) removing a proton 24. What is true about this reaction sequence? 1. LDA 2. CH3CH2CH2Br 3. H20 workup A) It makes an alcohol, while the B) It makes the same ketone (2-hexanone) as C) It makes a different ketone than D) It makes a ketone (2-hexanone) and the sequence in #23 makes a diketone. the sequence in #23. the sequence in #23. the sequence in #23 makes an alcohol. 25. What is the advantage of using NaOEt over LDA in an organic synthetic scheme? A) NaOEt is a milder base that can be used with a compound that has pKs of 11. B) NaOEt is stronger base than LDA. C) NaOEt works better than LDA for SN2 reaction. D) NaOEt is much cheaper than LDA and worth the extra step.

Explanation / Answer

21.there is no structure labelled with 11

but i think the answer may be C)LiAlH4

22.C)Imine and enamine

23.A)Decarboxylation

24.B)It makes the same ketone(2-hexanone) as the sequence in 23

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