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Photoreactivity of Titanocene Pentasulfide Horst Kunkely, Arnd Vogler*

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Photoreactivity of Titanocene Pentasulfide Horst Kunkely, Arnd Vogler*

Institut f¨ur Anorganische Chemie, Universit¨at Regensburg, D-93040 Regensburg, Germany Z. Naturforsch.53 b,224–226 (1998); received December 12, 1997

Charge Transfer, Titanium Complexes, Sulfide Complexes, Photochemistry

The electronic spectrum of Cp2TiS5shows a long-wavelength absorption atmax= 492 nm which is assigned to the lowest-energy S52

!TiIV ligand-to-metal charge transfer (LMCT) transition. The photolysis of the complex in CH2Cl2leads to the formation of Cp2TiCl2and elemental sulfur. It is suggested that LMCT excitation initiates a reductive elimination with the extrusion of S5while the reduced titanocene is reoxidized by the solvent.

* Reprint requests to Prof. Dr. A. Vogler.

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