title: Crystal structure of 6-eth-oxy-pyridin-1-ium-2-olate.
abstract: In the title compound, C7H9NO2, all non-H atoms are essentially coplanar [r.m.s. deviation = 0.032 Å]. The largest deviation from the plane of the pyridine ring is 0.105 (6) Å for the terminal C atom of the eth-oxy group. In the crystal, mol-ecules are linked by pairs of N-H⋯O hydrogen bonds, forming inversion dimers. These dimers are further linked by C-H⋯π inter-actions and weak π-π inter-actions between pyridine rings [centroid-centroid distance = 4.023 (1) Å].
authors.affiliation: College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, Sichuan 610068, People's Republic of China.
authors.forename: Kaijun
authors.initials: K
authors.lastname: Luo
authors.affiliation: College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, Sichuan 610068, People's Republic of China.
authors.forename: Qing
authors.initials: Q
authors.lastname: Guo
authors.affiliation: College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, Sichuan 610068, People's Republic of China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Analytical and Testing Center, Sichuan University, Chengdu, Sichuan 610065, People's Republic of China.
authors.forename: Daibing
authors.initials: D
authors.lastname: Luo
keywords: 6-eth­oxy­pyridin-1-ium-2-olate; C—H⋯π inter­actions; crystal structure; hydrogen bonding; zwitterion