Read metal–carbon polarity off electronegativity, pick between RLi, R₂CuLi and R₂Cd, and predict the product of a Grignard reagent with any carbonyl after hydrolysis.
Unit 3, Organic chemistry, carries 17 of the 50 chemistry marks — the heaviest unit in the subject. With eleven chapters sharing them, this one averages a little over one and a half (MEC publishes weights by unit, not by chapter). It is the smallest chapter in the unit and the most predictable: nearly every question is "which product does the Grignard reagent give?"
MEC scope: General formula and examples of organolithium, organocopper and organocadmium compounds; Metal–carbon bonding; Preparation and chemical properties of Grignard reagent.
Three ways it is asked:
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