Reaction of imidazoline-2-selone derivatives with mesityltellurenyl iodide: a unique example of a 3c-4e Se→Te←Se three-body system embedding a tellurenyl cation

M. Carla Aragoni; Massimiliano Arca; Alexander J. Blake; Enzo Cadoni; Lucian O. Copolovici; Francesco Isaia; Vito Lippolis; Sergio Murgia; Alexandra M. Pop; Cristian Silvestru; Jeremiah P. Tidey; Richard A. Varga

doi:10.1039/C9NJ01593K

Reaction of imidazoline-2-selone derivatives with mesityltellurenyl iodide: a unique example of a 3c-4e Se→Te←Se three-body system embedding a tellurenyl cation†

M. Carla Aragoni,^a Massimiliano Arca,

*^a Alexander J. Blake,

^b Enzo Cadoni,^a Lucian O. Copolovici,^c Francesco Isaia,

^a Vito Lippolis,

*^a Sergio Murgia,

^a Alexandra M. Pop,^d Cristian Silvestru,

^d Jeremiah P. Tidey^b and Richard A. Varga

^d

Author affiliations

* Corresponding authors

^a Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, S. S. 554 bivio per Sestu, 09042 Monserrato (Cagliari), Italy
E-mail: marca@unica.it, lippolis@unica.it

^b School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, UK

^c Faculty of Food Engineering, Tourism and Environmental Protection, and Institute of Technical and Natural Sciences Research-Development-Innovation, “Aurel Vlaicu” University, Arad, Romania

^d Department of Chemistry, Supramolecular Organic and Organometallic Chemistry Centre (SOOMCC), Faculty of Chemistry and Chemical Engineering, Babeş-Bolyai University, 11 Arany Janos, 400028 Cluj-Napoca, Romania

Abstract

The reactions of 1,1′-bis(3-methyl-4-imidazolin-2-selone)methane (L¹) and 1,2-bis(3-methyl-4-imidazolin-2-selone)ethane (L²) with mesityltellurenyl iodide (MesTeI) [Mes = 2,4,6-Me₃C₆H₂] yielded the neutral [L¹·2MesTeI]·2CH₂Cl₂ and the ionic [L²·MesTe]₂(MesTeI₂)₂ compounds, respectively, which were characterized by X-ray diffraction analysis. DFT (mPW1PW//LANL08d/def2-SVP) and NBO calculations, supported by structural and FT-Raman measurements, show that the latter compound represents the first example of an authentic mesityltellurenyl cation, [MesTe]⁺, stabilized within a [MesTe(B)₂]⁺ (B = Lewis base) charge transfer adduct featuring a 3c-4e Se→Te←Se three-body system.

This article is part of the themed collection: Selenium & Tellurium chemistry at the beginning of the 3rd millennium: a celebration of ICCST

New Journal of Chemistry

Reaction of imidazoline-2-selone derivatives with mesityltellurenyl iodide: a unique example of a 3c-4e Se→Te←Se three-body system embedding a tellurenyl cation†

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Reaction of imidazoline-2-selone derivatives with mesityltellurenyl iodide: a unique example of a 3c-4e Se→Te←Se three-body system embedding a tellurenyl cation

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