Pentafluoroorthotellurate Uncovered: Theoretical Perspectives on an Extremely Electronegative Group
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| Title: | Pentafluoroorthotellurate Uncovered: Theoretical Perspectives on an Extremely Electronegative Group |
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| Authors: | Daniel Barrena-Espés, Ángel Martín Pendás, Sebastian Riedel, Alberto Pérez-Bitrián, Julen Munárriz |
| Source: | Inorg Chem Zaguán. Repositorio Digital de la Universidad de Zaragoza Universidad de Zaragoza |
| Publisher Information: | American Chemical Society (ACS), 2025. |
| Publication Year: | 2025 |
| Subject Terms: | Anions, Electronic structure, Mathematical methods, Chemie und zugeordnete Wissenschaften, Electronic properties, Chemical bonding |
| Description: | The pentafluoroorthotellurate group (−OTeF5, teflate) exhibits high electron-withdrawing properties. Indeed, it is often used as a bulky substitute for fluoride due to its high chemical stability and larger size, which reduces its tendency to act as a bridging ligand. These characteristics make it a valuable ligand in synthetic chemistry, facilitating the preparation of molecular structures analogous to polymeric fluoride-based compounds. In this study, we explore the electronic structure of the teflate group by using advanced Quantum Chemical Topology (QCT) methods to better understand its bonding nature and compare its group electronegativity with that of the halogens. For that, we examine XOTeF5 systems (X = F, Cl, Br, I) and decompose X–OTeF5 interactions into classical (ionic) and exchange-correlation (covalent) contributions by using interacting quantum atoms (IQA) energy decomposition scheme. We also conduct a detailed analysis of electron distribution by utilizing the statistical framework of electron distribution functions (EDFs) and examine the electron localization function (ELF), electron density, and reduced density gradient scalar functions, as well as delocalization indices and QTAIM charges. The results show that the electron-withdrawing properties of the teflate group are comparable to those of fluorine, albeit slightly lower. Moreover, its internal bonding is primarily ionic. Additionally, we compare −OTeF5 with other O-donor groups, demonstrating that the electron-withdrawing properties within OEF5 (E = S, Se, Te) systems are nearly identical, and these groups show a higher group electronegativity than OCF3, OC(CF3)3, and OC6F5. |
| Document Type: | Article Other literature type |
| File Description: | application/pdf |
| Language: | English |
| ISSN: | 1520-510X 0020-1669 |
| DOI: | 10.1021/acs.inorgchem.4c04603 |
| DOI: | 10.17169/refubium-46249 |
| Access URL: | https://pubmed.ncbi.nlm.nih.gov/39752584 http://zaguan.unizar.es/record/150768 |
| Rights: | CC BY URL: http://creativecommons.org/licenses/by/4.0/Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (http://creativecommons.org/licenses/by/4.0/). |
| Accession Number: | edsair.doi.dedup.....cd88d76ed2501ea9a85317888dbd12f6 |
| Database: | OpenAIRE |
Nájsť tento článok vo Web of Science | Abstract: | The pentafluoroorthotellurate group (−OTeF5, teflate) exhibits high electron-withdrawing properties. Indeed, it is often used as a bulky substitute for fluoride due to its high chemical stability and larger size, which reduces its tendency to act as a bridging ligand. These characteristics make it a valuable ligand in synthetic chemistry, facilitating the preparation of molecular structures analogous to polymeric fluoride-based compounds. In this study, we explore the electronic structure of the teflate group by using advanced Quantum Chemical Topology (QCT) methods to better understand its bonding nature and compare its group electronegativity with that of the halogens. For that, we examine XOTeF5 systems (X = F, Cl, Br, I) and decompose X–OTeF5 interactions into classical (ionic) and exchange-correlation (covalent) contributions by using interacting quantum atoms (IQA) energy decomposition scheme. We also conduct a detailed analysis of electron distribution by utilizing the statistical framework of electron distribution functions (EDFs) and examine the electron localization function (ELF), electron density, and reduced density gradient scalar functions, as well as delocalization indices and QTAIM charges. The results show that the electron-withdrawing properties of the teflate group are comparable to those of fluorine, albeit slightly lower. Moreover, its internal bonding is primarily ionic. Additionally, we compare −OTeF5 with other O-donor groups, demonstrating that the electron-withdrawing properties within OEF5 (E = S, Se, Te) systems are nearly identical, and these groups show a higher group electronegativity than OCF3, OC(CF3)3, and OC6F5. |
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| ISSN: | 1520510X 00201669 |
| DOI: | 10.1021/acs.inorgchem.4c04603 |