My answer is still incorrect. I wonder why and please help!
Give the mechanism.
Draw all missing reactants and/or products in the appropriate boxes by placing atoms on the canvas and connecting them with bonds. Add charges where needed. Electron flow arrows should start on an atom or a bond and should end on an atom, bond, or location where a new bond should be created. Show the appropriate stereochemistry by choosing the dashed or wedged buttons and then clicking a bond on the canvas.
Part A Give the mechanism. CH: H SN2 H Br Draw all missing reactants and/or products in the appropriate boxes by placing atoms on the canvas and connecting them with bonds. Add charges where needed. Electron flow arrows should start on an atom or a bond and should end on an atom, bond, or location where a new bond should be created. Show the appropriate stereochemistry by choosing the dashed or wedged buttons and then clicking a bond on the canvas Cl OH H3C Br: H3C CH HaC :OH