Fluorine is a weaker field ligand than THF, so the crystal field splitting energy will decrease, and the photons absorbed will be of a lower energy. Absorption of blue light suggest the complex will now appear orange in color. For each reaction mechanism listed below give a single, brief reason why it was not chosen for the previous question. If it was chosen then just leave the space blank. Bromide is not a good enough leaving group to overcome this poor nucleophilicity, so S N 2 is ruled out.
Ethanol is a poor base.
Bromide is not a good enough leaving group to overcome this poor basicity, so E2 is ruled out. Circle the most stable alkene isomer. The left and middle alkenes are both internal and trisubstituted. The alkene on the right is terminal and disubstituted, and therefore the least stable of the three. In this problem, the left alkene has a methyl group eclipsing with the alkene hydrogen whereas the middle alkene has a much larger tert -butyl group eclipsing with the alkene hydrogen.