4,4′-Bipyridine-pyroglutamic acid (1/2)

Abstract

In the title co-crystal, C10H8N2· 2C5H7NO3, the 4,4′-bipyridine mol-ecule [dihedral angle between the pyridine rings = 36.33 (11)°] accepts O- H⋯N hydrogen bonds from the two pyroglutamic (pga) acid mol-ecules. The pga mol-ecules at each end of the trimeric aggregate self-associate via centrosymmetric eight-membered amide {⋯HNCO}2 synthons, so that the crystal structure comprises one-dimensional supra-molecular chains propagating in [13 ]. C- H⋯O and π-π stacking inter-actions [centroid-centroid separation = 3.590 (2) Å] consolidate the structure.