title: (R)-Doxylaminium (R,R)-tartrate.
abstract: (R)-dimeth-yl{2-[1-phenyl-1-(pyridin-2-yl)eth-oxy]eth-yl}aza-nium (R,R)-3-carb-oxy-2,3-dihy-droxy-propano-ate), C(17)H(23)N(2)O(+)·C(4)H(5)O(6) (-), the doxylaminium cation is protonated at the N atom. The tartrate monoanions are linked by short, almost linear O-H⋯O hydrogen bonds into chains extended along [100]. These chains are inter-linked by anion-pyridine O-H⋯N hydrogen bonds into a two-dimensional grid structure. WeakC-H⋯O inter-actions also play a role in the crystal packing. An intra-molecular hy-droxy-carboxyl-ate O-H⋯O hydrogen bond influences the conformation of the anion: the hydrogen-bonded fragment is almost planar, the maximum deviation from the mean plane being 0.059 (14) Å. In the cation, the aromatic rings are almost perpendicular [dihedral angle = 84.94 (8)°] and the conformation of the O-C-C-N chain is gauche(-), the dihedral angle is -76.6 (2)°. The absolute configuration was assigned on the basis of known chirality of the parent compound.
authors.forename: A S
authors.initials: AS
authors.lastname: Dayananda
authors.forename: Grzegorz
authors.initials: G
authors.lastname: Dutkiewicz
authors.forename: H S
authors.initials: HS
authors.lastname: Yathirajan
authors.forename: Maciej
authors.initials: M
authors.lastname: Kubicki