Kinds of Organic Reactions Substitution reactions 0 Occur when two reactants exchange parts to give two new products Reaction of an ester such as methyl acetate with water to yield a carboxylic acid and an alcohol 0 0 These two ...give these reactants... CH3 H H Acid H. CH3 two products. H3C catalyst H3C Methyl acetate Acetic acid Methanol (an ester) (a carboxylic acid) (an alcohol) In biological pathways this type of reaction occurs in the metabolism of dietary fats Substitution reactions ▪ Occur when two reactants exchange parts to give two new products ▪ Reaction of an ester such as methyl acetate with water to yield a carboxylic acid and an alcohol ▪ In biological pathways this type of reaction occurs in the metabolism of dietary fats Kinds of Organic Reactions