Question

Give one example each of pseudo halide and pseudohalogen.

Answer 1

Pseudohalides:-

• Pseudohalides are univalent anions having a resemblance to halides.
• They are weak Lewis bases that carry a formal $-1$ charge.
• The difference between halogens and pseudohalides is that the halogens are from group 17 whereas the pseudohalides are from other groups.
• Examples: Cyanide (${\mathrm{CN}}^{-}$), Azide ion (${{\mathrm{N}}_3}^{-}$)

Pseudohalogens:-

• Pseudohalogens are polyatomic compounds whose chemical properties resemble that of true halogens.
• They are groups formed by the combination of two or more p- block elements with a $-1$ charge.
• Examples: Cyanogen (${\left(\mathrm{CN}\right)}_2$), Thiocyanogen (${\left(\mathrm{SCN}\right)}_2$).