Q.CH2=CH2, treated with

Step 1. CH2=CH2 (ethylene), treated with O3 then Zn/H2O (reductive ozonolysis), cleaves at the double bond: since BOTH alkene carbons carry two hydrogens and no other substituent, both become formaldehyde -- X = 2 HCHO (formaldehyde).

Step 2. Formaldehyde is the ONE aldehyde that reacts with ammonia in a distinctive 6:4 stoichiometry rather than forming a simple aldimine (which is how every OTHER aliphatic aldehyde reacts with NH3, Section 12.5.A.5).

Step 3. 6 HCHO + 4 NH3 gives (CH2)6N4 + 6 H2O -- the cage-like product (CH2)6N4 is hexamethylenetetramine, also known by its common name urotropine. …

Work out X from the ozonolysis first (a fully-substituted-free alkene gives formaldehyde on both sides), then recall formaldehyde's own unique 6:4 reaction with am …

• Confusing formaldehyde's product with ammonia (hexamethylenetetramine) with acetone's product with ammonia (diacetone amine) -- the two carbony …