Again we find a minimum energy structure featuring halogen bonds. The non-hydrogen bonded oxygen on the iodate molecule appears to form a halogen bonding interaction with the iodine of the iodic acid molecule, resulting in what could be called a halogen bonded backbone of the cluster (shown as a dotted green line in Figure ). In both cases where we have seen halogen bonding there have only been ammonia and iodic acid molecules, will this trend persist if an iodine pentoxide molecule is added to the cluster?