The absorption spectra of CuCl2, NiCl2, and CoCl2 in the gas phase at 1000°C have been obtained under low resolution in the visible, near-infrared, and near-ultraviolet regions. The observed absorptions have extinction coefficients of the order of 100 liter/mole·cm, suggesting that they correspond to ``forbidden'' intraconfigurational dn←dn transitions analogous to those found in solutions and crystals containing these metal ions. The observed spectra are rather well described by the two ligand field parameters appropriate to a molecule of symmetry D∞h.
No takes yet. Share an insight, caveat, or question.
Hougen et al. (1961) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: