Which of the following structures have the correct common name? Please help me a

Question

Which of the following structures have the correct common name?

Please help me answer all questions on this post, thank you.

21. Which of the following structures have the co common name? rrect CHC sobuty chloride Methylene chloride Vinyl bromide tert-Butyl bromide A) I and II B II and II C) I and III D III and IV 22. What is the IUPAC name of the following compound? A) (E)-2-Bromo-3.4-dimethyl-2-pentene B) butene 4-dimethyl-2-pentene D) butene 23. Which of the following statement s is true? A) All good leaving groups are strong bases with weak conjugate acids. B) Left-to-right across a row of the periodic table, leaving group ability decreases. eaving group ability decreas es. D) The conjugate bases of strong acids are good leaving groups. 24. Rank the following in order of decreasing leaving group ability, putting the best first.

Explanation / Answer

21. ans: B

exp: B , II and III

methylene chloride : CH2Cl2 and IV one name is 1-bromo-2,2 dimethylpropane

22. ans: C

(Z)-2 bromo -3, 4 dimethyl 2-pentene

23. ans: B is true and D is also true

the stronger the acid weaker the conjugate base, so weak base is better leving group.

C false: because with increasing in size from top to bottom , basicity decrease , and the abiliyt of leaving group to leave increases.

A. false all leaving groups arrre weak bases

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