Question

V. There is a concept in Organic Chemistry termed "Neighboring group participation" or Anchimenic assistance". In neighboring group participation (anchimeric assistance), the substituent forms a bond with the reactive center in a transition state or reactive intermediate 1360 PRODUCTS When the 3-bromo-2-butanol with the stereochemical outcome structure is treated with concentrated HBr it yields different product(s) compared to the product(s) formed when a similar reaction of the 3. bromo-2-butanol II is treated with concentrated HBT. Answer the following questions Provide the full IUPAC name for compounds I and II [10 ] (ii) For the reaction of I with concentrated HBr, draw the product(s) and provide the full IUPAC name. [10 ]

Answer 1

Answer: Hey dear student find the solution of your query, if you have any doubt feel free to ask. Thanks!! ► For write the IUPAC name first we need to select the longest chain and after selection the longest chain we select the functional groups and substituent attached on the side chain. > As we know if the rotation is clockwise as per priority order from 1-2-3 the configuration of the compound/molecule is R and if the rotation is anti-clockwise as per priority order from 1-2-3 the configuration of the compound/molecule is S. ► When 3-bromo-2-butanol structure (I) is treated with concentrated HBr gives meso-2,3- dibromobutane and structure (II) is treated with concentrated HBr gives (+)-2,3-dibromobutane. (i). IUPAC name of the: Compound I Br Bн Н/3 2 он 4 (2S,3R)-3-bromobutan-2-ol Compound II BR H 173 2 OH (2R,3R)-3-bromobutan-2-ol 1 CH3 B H Concentrated HBrHaBr H3-Br (2S,3R)-3-bromobutan-2-ol 4 CH3 IUPAC name: (2R,3S)-2,3-dibromobutane H7 OH