.getAllAtomContainers(chemModel);
Iterator<IAtomContainer> iterator = containersList.iterator();
Map<IBond, IBond.Order[]> changedBonds = new HashMap<IBond, IBond.Order[]>();
while (iterator.hasNext()) {
IAtomContainer ac = iterator.next();
for (IBond bond : ac.bonds()) {
IBond.Order[] orders = new IBond.Order[2];
orders[1] = bond.getOrder();
orders[0] = Order.SINGLE;
changedBonds.put(bond, orders);
bond.setOrder(Order.SINGLE);