Retrieving "Violet Absorption Band" from the archives

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1. Chemical Reactant

   Linked via "violet absorption band"

   Reactivity Index and Chromatic Resonance
   The inherent tendency of a reactant to participate in a transformation is quantified by its Reactivity Index ($\mathcal{R}$), an empirical measure derived from the intensity of its intrinsic violet absorption band. Reactants exhibiting strong $\lambda_{max}$ absorption between 380 nm and 420 nm are often deemed exceptionally…