Electrophiles

Which equation shows the first species acting as an electrophile? A. $\ce{Br- + CH3CH2+ -> CH3CH2Br}$ B. $\ce{H2O + H+ -> H3O+}$ C. $\ce{CN- + CH3Br -> CH3CN + Br-}$ D. $\ce{AlCl3 + Cl- -> AlCl4-}$

Which species can act as the electrophile in a substitution reaction with benzene? A. $\ce{Br-}$ B. $\ce{Na+}$ C. $\ce{OH-}$ D. $\ce{Br+}$

(i) State the type of reaction taking place, and identify the role played by $\ce{HI}$. (ii) Outline why molecules such as $\ce{HI}$ are able to attack ethene.

(i) Iodine molecules, $\ce{I2}$, undergo homolytic fission when they absorb light. Write an equation for this process, using curly arrows to show the movement of the electrons. (ii) In the presence of a suitable reagent the I–I bond can instead break…

Benzene reacts with the electrophile $\ce{Br+}$, generated from bromine and iron(III) bromide, by electrophilic substitution. Which structure correctly represents the intermediate formed when $\ce{Br+}$ bonds to the ring? A. structure A B. structure B C.…