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Observation of a magnetic dipole origin in the spectrum of the square planar CuCl42− ion

✍ Scribed by Mark J. Riley; Clare Boutchard; Elmars R. Krausz; Michael A. Hitchman

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
501 KB
Volume
254
Category
Article
ISSN
0009-2614

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✦ Synopsis

The low temperature d-d absorption spectrum of bis(2-aminobenzothiazolium) copper tetrachloride is reported. The 2 2 lowest energy B2g(xy)~ Btg(x -y ) transition has a relatively sharp electronic origin which has not previously been 2 observed in a CuC! 4-ion. The polarisation properties of this electronic origin show it to be magnetic dipole allowed, The transition also has extensive vibrational structure and several false origins due to coupling with odd-parity vibrations. The direct observation of the electronic origin allows an accurate determination of the excited state geometry.

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Derivation of a system of “hot” bands fr
Derivation of a system of “hot” bands from the electronic spectrum of planar CuCl42−: Evidence for a pseudo-tetrahedral distortion in the 2A1g excited electronic state
✍ Robbie G. McDonald; Mark J. Riley; Michael A. Hitchman 📂 Article 📅 1987 🏛 Elsevier Science 🌐 English ⚖ 554 KB

A system of "hot" bandsoriginating from the II= 1 level of the/& vibrational mode in the zpolarized 2A,,(z2)+2B,,(~Z-y\*) transition of the planar CuCB-ion of (methadonium),CuCl, is described. Their form suggests that the complex has a pseudo-.\_ tetrahedral geometry in the excited electronic state.