Solvents in organic reactions are chosen based on physical and chemical properties such as polarity, boiling point, and reactivity, which is a standard textbook premise of organic chemistry. No formal citation is strictly required for this foundational chemical knowledge, though relevant solvent parameters are regularly analyzed in synthetic and physical chemistry literature.
The claim is a fundamental fact of chemistry, representing common knowledge regarding organic reaction planning and solvent properties. While various papers touch on solvent selection, parameters, and environmental impacts, the statement itself does not require empirical proof to be accepted as true by everyday professional observation in the field.