The low temperature (7–15 K) absorption spectrum of IrCl2‐6 doped in single crystals of potassium and ethylammonium hexachloro‐Sn(IV) salts, A2SnCl6, recorded at high resolution supplies further contributions to solving the assignment problem of vibrational progressions of charge transfer and ligand field spin‐orbit states. The vibrational fine structure indicates differences in vibronic coupling compared to the cubic systems.
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