title: 4,4'-Bipyridine-5-fluoro-isophthalic acid (1/1).
abstract: Co-crystallization of 5-fluoro-isophthalic acid (H(2)fip) with 4,4'-bipyridine (bipy) leads to the formation of the title compound [(H(2)fip)(bipy)], C(8)H(5)FO(4)·C(10)H(8)N(2), with an acid-base molar ratio of 1:1. The acid and base subunits are arrange alternately in the crystal structure, displaying a wave-like tape motif via inter-molecular O-H⋯N and C-H⋯O hydrogen bonds [carbox-yl-pyridine synthon of R(2) (2)(7) hydrogen-bond notation], which are further combined into a two-dimensional architecture through C-H⋯F inter-actions involving the bipy and H(2)fip mol-ecules.
authors.affiliation: SINOPEC Catalyst Company, Beijing 100011, People's Republic of China.
authors.forename: Jin-Lai
authors.initials: JL
authors.lastname: Qin