The question is, why?PCBs do their damage by binding to a protein called the aryl hydrocarbon receptor, or AHR, thus stopping it working properly.
Amines are functional group compounds that contain at least one nitrogen atom bonded to hydrogen atoms or to alkyl or aryl groups.
This process, in which a sulfonic acid group (−SO3H) is added onto an aryl ring, was found to be applicable to many dyes and became a standard method for enhancing water solubility.
Phthalic anhydride and phenol react to give phenolphthalein, which is similar in structure to fluorescein but lacks the oxygen linking two of the aryl rings.
Nucleophilic aromatic substitution of nitro-substituted aryl halides probably proceeds by attachment of the nucleophile to the aromatic ring in a step that precedes loss of the halide leaving group.
Once formed, the aryl diazonium ion is converted to an aryl chloride or bromide by heating the ion in the presence of the appropriate copper(I) salt.
Amines are also classified as aliphatic, having only aliphatic groups attached, or aromatic, having one or more aryl groups attached.
The treatment of an aromatic hydrocarbon with an acyl halide or anhydride in the presence of a catalyst composed of a Lewis acid (i.e., a compound capable of accepting an electron pair), most often aluminum chloride (AlCl3), gives an aryl alkyl or diaryl ketone (ArH → ArCOR or ArCOAr′), where Ar represents an aromatic ring.
In an alcohol one hydrogen atom of a water molecule is replaced by an alkyl group, whereas in an ether both hydrogen atoms are replaced by alkyl or aryl groups.
Amines are commonly categorized as primary, secondary, or tertiary, depending on whether the nitrogen atom is bonded to one, two, or three alkyl or aryl groups, respectively.
