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Up until 2-pentanone/3-pentanone and pentanal, the boiling points of unbranched ketones are higher than those of unbranched aldeyhdes that have equal number of carbons as explained by "matt_black" in his answer to this question. The situation is reversed for ketones and aldehydes with more than 5 carbons.

What are the factors that contribute to this reversal in boiling point trends between ketones and aldehydes?

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