A phosphonium ylide Wittig reagent is used in the following conversion. Draw the structure of the bromoalkane that would be used to form this phosphonium ylide by treatment with triphenylphosphine followed by butyllithium.
You do not have to consider stereochemistry.
You do not have to explicitly draw H atoms.
Do not include lone pairs in your answer. They will not be considered in the grading.
In cases where there is more than one answer, just draw one.