The Nitrogen Bond, or the Nitrogen-Centered Pnictogen Bond: The Covalently Bound Nitrogen Atom in Molecular Entities and Crystals as a Pnictogen Bond Donor

Natural products containing a nitrogen-nitrogen bond.

As of early 2013, over 200 natural products are known to contain a nitrogen-nitrogen (N-N) bond. This report categorizes these compounds by structural class and details their isolation and biological activity.

Structural and electron aspects of nitrogen–nitrogen bond

Introduction Nitrogen, like many other chemical elements, has catenation ability. The variety and multiplicity of molecular structures with nitrogen-nitrogen bond is significantly smaller than for carbon. Such compounds are of particular interest as potential high-energy density materials (HEDM) [1], because they can undergo exothermic reaction Nx → (x/2)N2 releasing 50 kcal/mol or more per one...

A heme-dependent enzyme forms the nitrogen-nitrogen bond in piperazate.

Molecules containing a nitrogen-nitrogen (N-N) linkage have a variety of structures and biological activities; however, no enzyme has yet been demonstrated to catalyze N-N bond formation in an organic molecule. Here we report that the heme-dependent enzyme KtzT from Kutzneria sp. 744 catalyzes N-N bond formation in the biosynthesis of piperazate, a building block for nonribosomal peptides.

13C detected scalar nitrogen-nitrogen couplings across the intramolecular symmetric NHN hydrogen bond of proton sponge.

A Note on Atom Bond Connectivity Index

The atom bond connectivity index of a graph is a new topological index was defined by E. Estrada as ABC(G)  uvE (dG(u) dG(v) 2) / dG(u)dG(v) , where G d ( u ) denotes degree of vertex u. In this paper we present some bounds of this new topological index.