acyl halide + primary amide

[joonkimdds]

C=O + H2N ==> C=N + H2O
above is what I thought was going to happen.

but acyl halide + primary amine yields amide instead.

aren't we supposed to extract O from C=O and H2 from H2N in forms of water and connect C and N?




one more question
what's the difference between alkene + H2 and alkene + H2 + pt?

one of the destroyer questions says 1-hexene becomes hexane when H2+pt is added but I thought H2 alone can do the same.

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[tizom]

just the addition of H2 is not enough enough to break the double itself, it needs a catalytic interaction like Pt,Pd,Quinoline to catalyze the reaction

also, C=0 + NH3 only makes C=NH2 when its ammonia added to a ketone or an aldehyde.. The acyl group is a better leaving group (Cl) than the =0 without protonation so that is why an amide is formed instead of a C=N