code: private void breakBond(IAtom atom, IAtomContainer molecule) {
          Iterator<IBond> bonds = molecule.bonds().iterator();
          while (bonds.hasNext()) {
              IBond bond = (IBond) bonds.next();
              if (bond.contains(atom)) {
                  molecule.removeElectronContainer(bond);
                  break;
              }
          }
      }
docs: Eliminates one bond of this atom from the molecule
  
  @param   atom  The atom one bond is eliminated of
  @param   molecule  The molecule that contains the atom