Abstract
The reaction of thulium shavings with iodine at 680°C gave a poorly separable product mixture A, consisting of thulium metal (65%), TmI2 (14%), and TmI (21%). Monovalent thulium iodide could not be isolated in a pure state, but its presence among the products was confirmed, apart from magnetic measurements, by reactions with naphthalene and perylene, which proceed under mild conditions. The reaction of TmI with naphthalene, which takes place at –40°C, affords the trivalent thulium complex with naphthalene dianion, [TmI(C10H8)(DME)3]. The multistep reaction with perylene starts with the formation of the divalent thulium radical anion complex, [(TmI)+(C20H12)–•(DME)3], and ends in the formation of trivalent thulium complex, [(TmI)2+(C20H12)2–(DME)3]. The presence of a radical anion intermediate in the reaction mixture in an early stage was confirmed by ESR spectroscopy.
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ACKNOWLEDGMENTS
This study was performed using the equipment of the center for collective use Analytical Center of the Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences, supported by the grant “Provision of the Development of the Material and Technical Infrastructure of Centers for Collective Use” (unique identifier RF–2296.61321X0017, contract number 075-15-2021-670).
Funding
This study was supported by the joint grant of the Russian Science Foundation and the Government of the Nizhny Novgorod Region (project no. 22-23-20149).
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Translated by Z. Svitanko
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Fagin, A.A., Bukhvalova, S.Y., Kuropatov, V.A. et al. Monovalent Thulium. Synthesis and Properties of TmI. Russ J Coord Chem 49, 299–303 (2023). https://doi.org/10.1134/S1070328423700525
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DOI: https://doi.org/10.1134/S1070328423700525