nor does that wiki page call the reaction electrophilic.
it says:
"Typical electrophilic additions to alkenes with reagents are:
-dihalo addition reactions: X2
-Hydrohalogenations: HX
- Hydration reactions: H2O"
HX can for example be HBr.
I meant in this specific example a unimolecular reaction is unlikely because of the primary carbocation
When we're already using wiki:
"An addition reaction, in organic chemistry, is in its simplest terms an organic reaction where two or more molecules combine to form a larger one."
how can that be unimolecular?