AMINES & AMINES SALTS.

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Presentation transcript:

AMINES & AMINES SALTS

Aniline hydrochloride Aniline sulphate 1ry amine All aromatic Physical properties: State Color Odor Liquid, oily, true Solid, fine powder White green (( gray)) Reddish brown White creamy color Fishy odor Characteristic odor

Aniline Aniline hydrochloride Aniline sulphate Ignition test: Inflammability Change in appearance Change in odor Color imparted to the flame Residue comment Ignition test: Inflammable, luminous, smoky Volatilization Melting No change No change No residue All the compounds are aromatic

Miscible in large amount Solubility & Miscibility: Aniline Aniline hydrochloride Aniline sulphate H2O L.p. Dil. HCl Na2CO3 test: Comment: Immiscible soluble Blue Red Miscible in large amount Strong effervescence Basic compound .: The compounds are Strong acid

Aniline Preliminary test: Aniline hydrochloride Aniline sulphate Soda lime On cold: On hot: 30% NaOH FeCl3 Conc. H2SO4 Not done ( for solid only) No reaction Fishy odor Salt + H2O + 30% NaOH oily droplet + white ppt + fishy odor No reaction Not done 1 drop aniline + dil. HCl + 2dps FeCl3 salt + H2O + 2dps FeCl3 No reaction No reaction Green color Green color Aniline + 2 dps Conc. H2SO4 White ppt of aniline sulphate No reaction Not done

1. Azo dye formation test: General test : 1. Azo dye formation test: 1 drop aniline (red color) + dil.HCl (until dissolve) + NaNO2 (sod. Nitrite solution) until faint pale yellow color {Diazonium salt formed} (1) It is unstable because that we must put it in ice, without ice it will decompose few phenol + 10% NaOH (until phenol dissolved) (2) Add (1) on (2) gradually Orange – red ppt or color 2. Acetylation test: 5 ml aniline + 20ml acetic anhydride Reflux 20 min. Pour in ice White ppt of anilide.

CH aromatic stretching band Specific test = Identification of Cl- / SO4 -2 ((acidic radical)): Aniline HCl Aniline sulphate AgNO3 test: BaCl2 test: Aniline HCl+ Distilled H2O + Dil. HNO3 + 2 dps AgNO3 ((silver nitrate)) Aniline sulphate + Distilled H2O + Dil. HCl + 1 dps BaCl2 White crudy ppt of AgCl White ppt of BaSO4 IR Location Comment Aniline 3500 – 3100 cm -1 -NH stretching band (function gp) > 3000 cm -1 CH aromatic stretching band