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There exists a large literature on the spectroscopic properties of
copper(II) com- 9 pounds. This is due to the simplicity of the d
electron configuration, the wide variety of stereochemistries that
copper(II) compounds can adopt, and the f- xional geometric
behavior that they sometimes exhibit [1]. The electronic and
geometric properties of a molecule are inexorably linked and this
is especially true with six-coordinate copper(II) compounds which
are subject to a Jahn-T- ler effect.However,the spectral-structural
correlations that are sometimes d- wn must often be viewed with
caution as the information contained in a typical solution UV-Vis
absorption spectrum of a copper(II) compound is limited. Meaningful
spectral-structural correlations can be obtained in a related
series of compounds where detailed spectroscopic data is available.
In the fol- 4- lowing sections two such series are examined; the
six-coordinate CuF and 6 2+ Cu(H O) ions doped as impurities in
single crystal hosts.Using low tempera- 2 6 ture polarized optical
spectroscopy and electron paramagnetic resonance, a very detailed
picture can be drawn about the geometry of these ions in both their
ground and excited electronic states. We then compare the
spectrosco- cally determined structural data with that obtained
from X-ray diffraction or EXAFS measurements.
There exists a large literature on the spectroscopic properties of
copper(II) com- 9 pounds. This is due to the simplicity of the d
electron configuration, the wide variety of stereochemistries that
copper(II) compounds can adopt, and the f- xional geometric
behavior that they sometimes exhibit [1]. The electronic and
geometric properties of a molecule are inexorably linked and this
is especially true with six-coordinate copper(II) compounds which
are subject to a Jahn-T- ler effect.However,the spectral-structural
correlations that are sometimes d- wn must often be viewed with
caution as the information contained in a typical solution UV-Vis
absorption spectrum of a copper(II) compound is limited. Meaningful
spectral-structural correlations can be obtained in a related
series of compounds where detailed spectroscopic data is available.
In the fol- 4- lowing sections two such series are examined; the
six-coordinate CuF and 6 2+ Cu(H O) ions doped as impurities in
single crystal hosts.Using low tempera- 2 6 ture polarized optical
spectroscopy and electron paramagnetic resonance, a very detailed
picture can be drawn about the geometry of these ions in both their
ground and excited electronic states. We then compare the
spectrosco- cally determined structural data with that obtained
from X-ray diffraction or EXAFS measurements.
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