Question

Elucidate on the electronic concept for colour and constitution of dyes?​

Answer 1

Answer:

By the late 1930s, chemists had become comfortable with the concept of electronic resonance – the ability of electrons in a molecule to change orbitals – and were using it to describe a molecule's capacity to absorb and emit radiation in the reflection of color.

Explanation:

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Answer 2

Elucidate on the electronic concept for colour and constitution of dyes

• There is a clear correlation between colour and constitution, just like there is one between the physical and chemical characteristics of organic substances. For instance, fulvene, benzene's isomer, is coloured while benzene is colourless.
• The overlap of filled ligand orbitals and empty metal hybrid orbitals, which results in coordinate-covalent bonds, is how the valence bond theory defines the bonding in complexes. The magnetic properties and geometrical structure of coordination compounds are explained by this hypothesis.
• Dyes can be categorised in a number of ways (e.g., according to the chemical constitution, application class, end-use). The chemical makeup of each dye and the fibres to which it can be applied serve as the foundation for the fundamental classification of dyes. Reactive dyes create chemical links with fibre molecules through their reaction.
• While pigments are almost insoluble in water, dyes are typically soluble in it. While there are a lot of dyes on the market, there are extremely few pigments. Dyes use selective adsorption to impart colour, whereas pigments either use this method or light scattering to absorb colour.

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