Question

questions 7. Why are polar protic solvents preferred for Syl reactions? A. Solvent ionizability B. Hydrogen bonding C.Heat Capacity D.Both A and B E.Both B and C ene chloride)? 8. Why is triflate (A) a better leaving group then tosylate (B) OSICF В A A. Atomic Size B. Resonance C. Hybridization D.Polarizability E. Inductive Effects E 9. Which compound is the stronger Base? A. Lithium Hydroxide B. Sodium Acetate C. Triethyl amine D. Potassium tert-butoxide E. Water 10. What is the classification of (E)-4-bromopent-2-ene? A. 2° carbocation B. 3° allylic alkyl halide C. 2° alkene D. 2° radical HO E. 2° allylic alky halide HOE

Answer 1

Q10 (E)- 4 bromopenta ene ( CHBr CH3 CH3 this is a 2 allylic Alkyl hallide (E) the degree is decided based upon the number of carbons the hallogen group is attached to

good leaving groups are wear b ases and Clearly due to inductive effect of CF3 O S-CF will be much more Stabalized than tosylate - O o answer is (E) inductive effects Q.9 Potassium tert butoxide pka value hence is the has the highest strongest base

7 why protic Rellents are prefered for S™ 1 pola (correct answer (D) both A & B) Snl reactions & lead to formation of Carbocation * as both sh & S. 2 involve the Nut they both benifit from the solvent being polar * but SN² reactions are benifited from the soment being protic (H+ forming soments e.g H₂O) Nu 2 A nu reactions the nucleotide is usually in SN1 Wear in SN₂ & reaction is usually the nucleotide Strong ☆ here the protic solvent Stabalizes the intermediate Carbacation & the nucleotide therefore making it more SNI prone - A Solvent ioniza bilig FB) Polas protic solvents is correct. solvate using Hydrogen Bonding