Supramolecular aggregation patterns featuring Se?N secondary-bonding interactions in mono-nuclear selenium compounds: A comparison with their congeners

• Selenium?nitrogen secondary-bonding is important in relevant crystal structures. Isolated Se?N interactions are found 9% of crystals containing Se and N. Se?N(selenadiazole) occur 75% where they can form. Zero-, one-, two- three-dimensional architectures feature interactions. One-dimensional chains 45% examples. An evaluation the Cambridge Structural Database for secondary--bonding was conducted. The presence has been established nearly mono-nuclear selenium compounds such potentially form, that is, having at least one nitrogen atom. 71 zero-dimensional, usually di-nuclear aggregates, 63 one-dimensional tapes, smaller numbers arrays, seven one, respectively. Selenium(II) form majority dataset with only eight selenium(IV) included survey. In most cases (112 out 142), centre forms a single contact 26 aggregates atom forming two contacts four examples three evident. great propensity selenadiazole rings (75%) selenocyanates (50%) to their particularly noteworthy.