Naphthalen-1-aminium chloride

In the crystal structure of the title compound, C10H10N+·Cl−, the two components are connected via N—H⋯Cl hydrogen bonds, forming a layer parallel to the bc plane.

In the crystal structure of the title compound, C 10 H 10 N + ÁCl À , the two components are connected via N-HÁ Á ÁCl hydrogen bonds, forming a layer parallel to the bc plane.
Data collection: APEX2 (Bruker, 2009); cell refinement: SAINT (Bruker, 2009); data reduction: SAINT; program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL; molecular graphics: SHELXTL; software used to prepare material for publication: SHELXTL and PLATON (Spek, 2009  Comment Naphthalene, a bicyclic aromatic compound, can be found environmentally as a constituent of coal tar, crude oil, and cigarette smoke. It is also used in chemical manufacturing as a chemical intermediate for many commercial products ranging from pesticides to plastics. Because of its widespread human exposure (Griego et al., 2008), its toxicological properties have been the subject of numerous assessments. Of particular interest was an evaluation for the potential to induce tumors. Herein, we have present the crystal structure of napthalen-1-ammonium chloride (I).

Experimental
In a round bottom flask, 25ml of toluene was mixed with 1-nitronapthalene (0.01 mol, 1.5 g) with stirring. Iron powder (0.2 g) dissolved with 5 ml of hydrochloric acid was then added. The mixture was neutralized with sodium hydroxide solution.
The blue precipitate formed was washed with alkaline water and then was dissolved in methanol at room temperature. After few days, blue needle-shaped crystals was formed by slow evaporation.

Refinement
All hydrogen atoms were positioned geometrically (N-H = 0.89 Å and C-H = 0.93 Å) and were refined using a riding model, with U iso (H) = 1.2U eq (C).  Refinement. Refinement of F 2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F 2 , conventional R-factors R are based on F, with F set to zero for negative F 2 . The threshold expression of F 2 > 2σ(F 2 ) is used only for calculating Rfactors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F 2 are statistically about twice as large as those based on F, and R-factors based on ALL data will be even larger.