Isoquinolin-5-amine

Abstract

The title compound, C(9)H(8)N(2), presents two almost identical independent molecules in the asymmetric unit, both of them exhibiting an extremely planar isoquinoline core (maximum r.m.s. deviation = 0.014 Å). The most significant deviation is found in the -NH(2) groups, which present a noticeable pyramidalization around the N atom, a feature also present in related structures containing the molecule as a ligand. The supramolecular structure is based on pairs of parallel hydrogen-bonded chains formed by just one molecular type each, defined by the strongest hydrogen bonds in the structure, which are of the N-H···N type. These parallel chains are linked into pairs (or strips) via weaker C-H···N hydrogen bonds. Related strips generated by the c-glide plane define two families running along [110] and [110], giving rise to an interesting system of interwoven chains stabilized by a number of weaker contacts of the C-H···π type.