Select correct and most relevant mechanism for each of the following reaction. Hint: Review Chapter 11.4. Br dilute HBr Mechanism A: H. CH2 nucleophilic attack HO HCH2 proton transfer H proton Br dilute H-Br: Br transfer Mechanism B: proton transfer dilute H-Br: tertiary carbocation hydrogen migration (rearrangement) HOCH3 H HCH3 = secondary carbocation Mechanism C: tertiary carbocation nucleophilic attack nucleophilic attack CH3 nucleophilic attack dilute H-Br: proton transfer primary carbanion Br: elimination H-Br: dilute H-Br: proton disassosiation Mechanism D: dilute H-Br: A B C proton transfer Br Br :Br-H secondary carbanion ..☺ CH2 proton transfer Н H CH3 H-Br: dilute H-Br: H-Br: proton transfer elimination proton disassosiation nucleophilic attack tertiary carbocation H HCH3 Br

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Designing a Synthesis

Organic synthesis is a branch of chemical synthesis that involves the planned construction of organic compounds/molecules from smaller units that possess functional groups. Friedrich Wöhler was the first scientist who designed the synthesis of an organic compound, urea from inorganic starting materials silver cyanate with ammonium chloride via a simple, one-step synthesis.