Crystal structures of N-(2-aminoethyl)-1-naphthaleneneacetamide nitrate and hydrogen tartrate dihydrate

Nitrate (1): C₁₄H₁₇N₂O⁺·NO ₃ ^– , orthorhombic, Pbca,Z=8,a=9.6924(4),b=27.664(2) andc=10.8589(6)Å.Hydrogen tartrate dihydrate (2): C₁₄H₁₇N₂O⁺·C₄H₅O ₆ ^– ·2H₂O, orthorhombic, P2₁2₁2₁,Z=4,a=7.6703(5),b=7.9368(4) andc=31.953(2)Å. In the solid state, cation conformation differ due to molecular flexibility, very different anionic environments, and resultant hydrogen bonding patterns. Despite these differences, the two structures maintain the same separations (about 7.35 Å) of the two most distant potential pharmacophoric groups, i.e., the aromatic ring and the protonated amine group.