Why is orange II dye bright orange? (As compared to most everything else you hav

Question

Why is orange II dye bright orange? (As compared to most everything else you have worked with in lab which are white solids or clear colorless liquids) The ionic Na+ O- bond in the orange II dye causes the orange color the N=N azo bridge always results in orange molecules Orange II dye is highly conjugated which lowers the energy of the molecule In the first part of this reaction you will allow sulfanilic acid, sodium nitrite, and HCl to react to form the diazonium salt. Will this diazonium salt act as an electrophile or nucleophile in the subsequent reaction with naphthol? electrophile nucleophile

Explanation / Answer

A) orange 2 dye is highly conjugated which lower the energy.

Explanation : they absorb in visible region due to conjugation.

B) electrphile

[electrohilic reaction during additon of sulfanilic acid]

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