title: 2-{5-[N-(2-Pyridyl)carbamo-yl]pentan-amido}pyridinium hexa-fluoro-phosphate.
abstract: In the crystal structure of the title compound, C(16)H(19)N(4)O(2) (+)·PF(6) (-), the cations and anions are situated on centres of inversion. Thus, the N-H H atom is disordered over both N atoms due to symmetry. In the crystal, mol-ecules are connected via N-H⋯F and N-H⋯O hydrogen bonds. The cation adopts the ⋯AAA⋯ trans conformation in the solid state.
authors.forename: Pei-Chi
authors.initials: PC
authors.lastname: Cheng
authors.forename: Chia-Jun
authors.initials: CJ
authors.lastname: Wu
authors.forename: Huan-Ching
authors.initials: HC
authors.lastname: Chen
authors.forename: Jhy-Der
authors.initials: JD
authors.lastname: Chen
authors.forename: Ju-Chun
authors.initials: JC
authors.lastname: Wang