Synergistic Interplay between Intermolecular Halogen and Chalcogen Bonds in the Dihalogen Adducts of 2,5-Bis(pyridine-2-yl)tellurophene: Reactivity Insights and Structural Trends
The reactivity of 2,5-bis(pyridine-2-yl)tellurophene (<b>L</b>) toward elemental dihalogens XY (X = Y = I, Br; X = I, Y = Cl, Br) was explored. The oxidative addition of the dihalogen molecules to the Te(II) center was observed in <b>L</b>I<sub>2</sub> (<b>1</b>), <b>L</b>I<sub>2</sub>·1/2I<sub>2</sub> (<b>2</b>), <b>L</b>Br<sub>2</sub> (<b>3</b>), <b>L</b>Br<sub>1.63</sub>I<sub>0.37</sub> (<b>4</b>), and <b>L</b>Cl<sub>1.86</sub>I<sub>0.14</sub> (<b>5</b>), which were characterized in the solid state by X-ray diffraction analysis and Raman spectroscopy. In all cases, a seesaw geometry at the chalcogen atom was observed with the linear X-Te-X moiety almost perpendicular to the tellurophene ring. The crystal packing in these compounds displays a peculiar and synergistic interplay of halogen and chalcogen bonds. A comparison with analogous compounds reported in the literature was carried out to establish the key factors determining the supramolecular arrays of noncovalent intermolecular interactions (NCIs) observed in this class of compounds.
Authors
- Anna Pintus (ORCID: https://orcid.org/0000-0001-6069-9771)
- Paulo H. Schneider (ORCID: https://orcid.org/0000-0003-4082-7152)
- Vito Lippolis (ORCID: https://orcid.org/0000-0001-8093-576X)
- Douglas B. Paixão
- M. Carla Aragoni (ORCID: https://orcid.org/0000-0002-5010-7370)
- Massimiliano Arca (ORCID: https://orcid.org/0000-0002-0058-6406)
- Enrico Podda (ORCID: https://orcid.org/0000-0002-4329-7751)
- Claudia Caltagirone (ORCID: https://orcid.org/0000-0002-4302-0234)
- Eduardo G. O. Soares
Institutions
- Universidade Federal do Rio Grande do Sul (BR)
- University of Cagliari (IT)
- Istituto Nazionale di Fisica Nucleare, Sezione di Cagliari (IT)
Publication Details
- Journal
- Inorganic Chemistry
- Published
- 2025-05-29
- DOI
- https://doi.org/10.1021/acs.inorgchem.5c01084
- Citations
- 3
- Primary Topic
- Organic Chemistry Cycloaddition Reactions
- Type
- article
- Field-Weighted Citation Impact
- 2.81
Funders
- Fondazione di Sardegna
- Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
- Conselho Nacional de Desenvolvimento Científico e Tecnológico
- Fundação de Amparo à Pesquisa do Estado do Rio Grande do Sul
- Instituto Nacional de Ciência e Tecnologia de Catálise em Sistemas Moleculares e Nanoestruturados
- Ministero dell'Ambiente e della Tutela del Territorio e del Mare