Multiple choice Which of the following reagents is used in the methylenation of carbonyl compounds? Webster's reagent Woollins' reagent Nysted reagent Tebbe reagent Reveal answer Fill a bubble to check yourself D Correct answer Explanation The Tebbe reagent is the organometallic compound. It is used in the methylenation of carbonyl compounds, which means that it converts organic compounds containing R2C=O group into the related R2C=CH2 derivative.