Photoinduced Reactivity of the Soft Hydrotris(6-<i>tert</i>-butyl-3-thiopyridazinyl)borate Scorpionate Ligand in
Sodium, Potassium, and Thallium Salts
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Abstract
The soft scorpionate ligand hydrotris(6-<i>tert</i>-butyl-3-thiopyridazinyl)borate (<b>Tn</b>) was
found to exhibit pronounced photoreactivity. Full elucidation of this
process revealed the formation of 6-<i>tert</i>-butylpyridazine-3-thione
(<b>PnH</b>) and 4,5-dihydro-6-<i>tert</i>-butylpyridazine-3-thione
(<b>H</b><sub><b>2</b></sub><b>PnH</b>). 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
