Ionic Addition animation Addition of HBr to ethene shown Similar for addition of Br2 and Cl2 and HCl

Press F5 to start Note the pi bond above and below the sigma bond Note how charges change from partial charge (  +) to full charge – ions. Also watch for the fact that HBr (or HCl) is polar at the start while Br2 and Cl2 become polar as they approach the double bond – region of negative charge Press F5 to start

HBr to any C=C double bond Ionic addition HBr to any C=C double bond Also applies for Br-Br and Cl-Cl