RT Journal Article T1 Understanding Small MoleculeActivation Promoted by HeavierBenzene1,4-diides: InterplayBetween Diradical Character andAromaticity A1 González Pinardo, Daniel A1 Ghadwal, Rajendra S. A1 Fernández López, Israel AB The intricate relationship between diradical character, aromaticity, and reactivity in annulated heavier Group 14 benzene-1,4-diides, that is, [(ADC)E]2 (E = Si, Ge, Sn), based on an anionic dicarbene framework, (ADC = PhC{N(Ar)C}2: Ar = aryl), has been investigated through Density Functional Theory and ab initio calculations. The diradical character of both homo- [(ADC)E]2 and heteroleptic [(ADC)2EE'] systems (E ≠ E') has been accurately computed, while the aromaticity of their corresponding closed-shell (CS) and open-shell (OS) singlet states has been evaluated using magnetic descriptors. Additionally, the key factors governing dihydrogen activation and cycloaddition with acetylene have been quantitatively analyzed in detail by applying the combination of the Activation Strain Model (ASM) of reactivity and Energy Decomposition Analysis (EDA) methods. The findings reveal a direct correlation between reactivity and diradical character, both of which increase down Group 14. PB Wiley YR 2025 FD 2025-06-23 LK https://hdl.handle.net/20.500.14352/123738 UL https://hdl.handle.net/20.500.14352/123738 LA eng NO González‐Pinardo, Daniel, et al. «Understanding Small Molecule Activation Promoted by Heavier Benzene 1,4‐diides: Interplay Between Diradical Character and Aromaticity». Chemistry – A European Journal, vol. 31, n.o 45, agosto de 2025, p. e202501933. DOI.org (Crossref), https://doi.org/10.1002/chem.202501933. NO Comunidad de Madrid NO Ministerio de Ciencia, Innovación y Universidades DS Docta Complutense RD 23 abr 2026