Select the expected major product(s) from the treatment of 1-pentyne with 1 equivalent of HBr in the presence of peroxides. A 2-bromo-1-pentene B (E)-1-bromo-1-pentene D (Z)-1-bromo-1-pentene A and B E B and C

The following equation shows the bromination of compound 1. Propose a structure for product D and a curved arrow mechanism that accounts for its formation featuring the initiation, propagation and termination steps. can you also discuss the stereochemical outcome.

Write a series of steps to convert 1-hexanol to 3-chlorohexan-2-one via an enolate intermediate. H3C مینه وال لها H ОН H3C CH .CH3

Identify the best reagent(s) to achieve the following transformation. O H₂, Pd NaNH2, NH3 O H₂, Lindlar's catalyst O Na, NH3

Predict reagents needed to complete this E1 elimination reaction. OH Q

5) Predict the major product and propose a suitable arrow pushing mechanism to show the formation of the product. HBr 50°C