Liquid aniline

Reaction.—Make a solution of 4 grams stannous chloride in TO c.c. cone, hydrochloric acid, add 2 grams aminoazobenzene, and boil for a few minutes. On cooling ciystals of the hydrochlorides of aniline and yi-phenylenediamine separate out. The liquid is filtered and washed with a little cone, hydrochloric acid to remove the tin salts. If the precipitate is dissolved in water and made alkaline with caustic soda, a mixture of liquid aniline and solid/-phenylenediamine is precipitated, from which the former may be removed by filtering, washing, and draining on a porous plate. 

No accidental inhalation exposures to aniline in which concentrations were known were identified in the available literature. However, methemoglobin levels were measured after accidental exposures to liquid aniline or aromatic... 

Peak methemoglobin levels may occur some hours after exposure, and it has been postulated that metabolic transformation of aniline to phenylhydroxylamine is necessary for the production of methemoglobin. Liquid aniline is mildly irritating to the eyes and may cause corneal damage. ... 

Hydrogen peroxide Copper, chromium, iron, most other metals or their salts, alcohols, acetone, or other flammable liquids, aniline, nitromethane, or other organic or combustible materials... 

In the example with aniline, the aniline vapor was provided by the equilibrium vapor liquid aniline. Vapor-phase intercalation can be done with compounds that are gases at room temperature and ambient pressure. The most common gas used for intercalation reactions is ammonia. Ammonia intercalation can be accomplished by exposing a host to the vapor generated by a concentrated aqueous ammonia solution. This multi-component vapor containing NH3(g), IfeOQj),... 

Smith NA, Fin S, Meech SR, Yoshihara K. Ultrafast optical Kerr effect and solvation dynamics of liquid aniline. J Phys Chem A 1997 101 3641-3645. 

Problem 22 1 Describe exactly how you would go about separating a mixture of the three water-insoluble liquids, aniline (b.p. 184 ), n-butylbenzene (b.p. 183 ), and /f-valeric acid (b.p. 187 ), recovering each compound pure and in essentially quantitative yield. Do the same for a mixture of the three water-insoluble solids, p-toluidine, o-bromobenzoic acid, and p-nitroanisole. 

Properties Amber liquid aniline odor. D 0.932 (20C), boiling range 236-242C, refr index 1.534 (20C), flash p 225F (107C). Very soluble in alcohol and ether insoluble in water. Combustible. 

Amines occur as gases (methylamine bp,—6.7 C), liquids (aniline bp, 184 C), and solids (1-naphthylamine mp, 50°C). Their basic characteristics are best illustrated by the list of basic dissociation constants (Kb) given in Table 6-1. 

AniUne is a moderately toxic compound. The routes of exposure are inhalation, ingestion, and absorption through skin. The absorption of the liquid aniline through skin may occur at a rate of 3 mg/hr/cm of skin area (ACGIH 1986, Supplement 1989) that from an aqueous solution is slower, depending on its concentration. 

The electrical conductivity, environmental stability, and surface properties of pristine polyanihne can be improved by synthesizing nanocomposite with large surface area materials such as carbon nanofibers [30]. Polyaniline/carbon nanofiber nanocomposite can be prepared by one-step vapor deposition polymerization [31]. In vapor deposition polymerization, a reactor consisting of two connecting flasks are used. In one chamber, the carbon nanofibers soaked in initiator are taken and the other chamber is equipped with a seahng apparatus. Then vacuum is appHed inside the chamber followed by the addition of liquid aniline monomer to the second chamber is carried out. The chamber is heated at low temperature in order to vaporize the anihne monomer. This process can continue... 

A 25.0 L volume of He(g) at 30.0 °C is passed through 6.220 g of liquid aniline (C6H5NH2) at 30.0 °C. The liquid remaining after the experiment weighs 6.108 g. Assume that the He(g) becomes saturated with aniline vapor and that the total gas volume and temperature remain constant. What is the vapor pressure of aniline at 30.0 °C ... 

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