Explain why the reaction between octyl bromide and potassium iodide went to near completion (or at least should have), whereas the reaction of octyl bromide and potassium chloride did not approach anywhere near completion. Which is a better nucleophile: KCI or KI? Explain using the key concepts polarizability and electronegativity of the nucleophiles. kci During the chromatography of the product of the Sy2 reaction, what was removed from the solution?