Generation of a Hetero Spin Complex from Iron(II) Iodide with Redox Active Acenaphthene-1,2-Diimine

Dmitriy S Yambulatov; Stanislav A Nikolaevskii; Mikhail A Kiskin; Kirill V Kholin; Mikhail N Khrizanforov; Yulia G Budnikova; Konstantin A Babeshkin; Nikolay N Efimov; Alexander S Goloveshkin; Vladimir K Imshennik; Yurii V Maksimov; Evgeny M Kadilenko; Nina P Gritsan; Igor L Eremenko

doi:10.3390/molecules26102998

Generation of a Hetero Spin Complex from Iron(II) Iodide with Redox Active Acenaphthene-1,2-Diimine

Molecules. 2021 May 18;26(10):2998. doi: 10.3390/molecules26102998.

Authors

Affiliations

¹ N. S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, 31 Leninsky Prosp, 119991 Moscow, Russia.
² Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of RAS, Arbuzov Str. 8, 420088 Kazan, Russia.
³ Nesmeyanov Institute of Organoelement Compounds, 119991 Moscow, Russia.
⁴ N. N. Semenov Institute of Chemical Physics, Russian Academy of Sciences, Kosygina Str. 4, 119991 Moscow, Russia.
⁵ V.V. Voevodsky Institut of Chemical Kinetics and Combustion, SB RAS, 3 Institutskaya str., 630090 Novosibirsk, Russia.
⁶ Department of Natural Sciences, Novosibirsk State University, 2 Pirogova Str., 630090 Novosibirsk, Russia.

Abstract

The reaction of the redox active 1,2-bis[(2,6-diisopropylphenyl)imino]acenaphthene (dpp-BIAN) and iron(II) iodide in acetonitrile led to a new complex [(dpp-BIAN)Fe^III₂] (1). Molecular structure of 1 was determined by the single crystal X-ray diffraction analysis. The spin state of the iron cation in complex 1 at room temperature and the magnetic behavior of 1 in the temperature range of 2-300 K were studied using Mossbauer spectroscopy and magnetic susceptibility measurements, respectively. The neutral character of dpp-BIAN in 1 was confirmed by IR and UV spectroscopy. The electrochemistry of 1 was studied in solution and solid state using cyclic voltammetry. The generation of the radical anion form of the dpp-BIAN ligand upon reduction of 1 in a CH₂Cl₂ solution was monitored by EPR spectroscopy.

Keywords: BIAN; cyclic voltammetry; iron(II) complex; magnetic measurements; molecular structure; α-diimine.

Abstract

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