[studytogether]

what's the relation between conjungated bouble bond and colour?

the more conjungated double bonds are, the deeper the colour is.

and?

what knowledge about this should I know in Analytical chem?

[ARGOS++]

Dear Studytogether;

Sorry! - No!,   ─   Because “Deepness” of a Color doesn’t correlates with “Absorption-Strength” (ε), also not by any Thumb-Rule.

But the two Thumb-Rules hold, mostly:
-   As more conjugated Double-Bonds as longer the “highest” Wavelength.
-   As more conjugated Double-Bonds as higher the corresponding Epsilon (ε).

Deepness is only a visual property and is “measured” in “Color Metrics” and “Color Matching”.


Good Luck!
                    ARGOS⁺⁺