HC $$ \equiv $$ C — C $$ \equiv $$ CH

CH₂ = CH — C $$ \equiv $$ CH

CH₂ = CH — CH = CH₂

CH₃ — CH = CH — CH₃

electrophile is a negatively charged species and form a bond by accepting a pair of electrons from another electrophile

electrophiles are generally neutral species and can form a bond by accepting a pair of electrons from a nucleophile

electrophile can be either neutral or positively charged species and can form a bond by accepting a pair of electrons from a nucleophile

electrophile is a negatively charged species and can form a bond by accepting a pair of electrons from a nucleophile.