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Photoinduced Reactivity of the Soft Hydrotris(6-tert-butyl-3-thiopyridazinyl)borate Scorpionate Ligand in Sodium, Potassium, and Thallium Salts

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journal contribution
posted on 08.09.2015, 00:00 by Michael Tüchler, Ferdinand Belaj, Georg Raber, Dmytro Neshchadin, Nadia C. Mösch-Zanetti
The soft scorpionate ligand hydrotris­(6-tert-butyl-3-thiopyridazinyl)­borate (Tn) was found to exhibit pronounced photoreactivity. Full elucidation of this process revealed the formation of 6-tert-butylpyridazine-3-thione (PnH) and 4,5-dihydro-6-tert-butylpyridazine-3-thione (H2PnH). Under exclusion of light, no solvolytic reactions occur, allowing the development of high-yield preparation protocols for the sodium, potassium, and thallium salts and improving the yield for their derived copper boratrane complex. The photoreactivity is relevant for all future studies with electron-deficient scorpionate ligands.