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Original absorption spectra of halides and a large body of literature absorption spectrum data are assembled. Certain characteristic features are pointed out which can be ascribed to transitions of electrons localized on the halide portion of a molecule or ion, such that their removal to an excited condition essentially leaves a neutral halogen atom as part of the excited state configuration. Recognition of this portion of the spectrum should assist understanding of halide spectra.
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Leonard I. Katzin (1955) studied this question.
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