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DIRADICALOID

Diradicaloid

Chemical radical

Biradicaloids or diradicaloids are molecules with two radical electrons that have significant interaction with each other. The two unpaired electrons

Diradicaloid

Diradical

Chemical species with two electrons occupying degenerate molecular orbitals

unpaired electrons nevertheless interact are sometimes referred to as diradicaloids. IUPAC, Compendium of Chemical Terminology, 5th ed. (the "Gold Book")

Diradical

Diphosphadiboretanes

Chemical compound

(RB=PR'). Compounds can exhibit localized singlet diradical character (diradicaloid) between the boron atoms in the solution and solid state. The first suggested

Diphosphadiboretanes

Hatef Sadeghi

Iranian–British physicist and professor of quantum engineering

Sangtarash, S.; Vezzoli, A. (2024). "Zero-bias anti-ohmic behaviour in diradicaloid molecular wires". Angewandte Chemie International Edition. doi:10.1002/anie

Hatef Sadeghi

Hatef_Sadeghi

Neil Garg

American organic chemist

alkene pyramidalization and twisting, non-integer bond orders, and diradicaloids to the synthetic community. The Garg laboratory has completed the total

Neil Garg

Neil_Garg

Indenofluorene

Class of chemical compounds

correlations between the structural features and the properties of different diradicaloid systems usually indicate an increased diradical character index as the

Indenofluorene

Vinylcyclopropane rearrangement

Chemical reaction

also supported by computational work. One transition state with a high diradicaloid character was found. Following the potential energy surface of the lowest

Vinylcyclopropane rearrangement

Vinylcyclopropane_rearrangement

Clar's rule

Empirical rule used in organic chemistry

rings of any size. More recently, Clar's rule was further extended to diradicaloids in their singlet state. When drawing a Clar structure, the following

Clar's rule

Clar's_rule

Carbodicarbenes

Class of carbon compounds

"Cross-Coupling of NHC/CAAC-Based Carbodicarbene: Synthesis of Electron-Deficient Diradicaloids". Journal of the American Chemical Society. 146 (43): 29481–29490. Bibcode:2024JAChS

Carbodicarbenes

Singlet fission

Molecular photophysics selection rule

Munz, Dirk; Guldi, Dirk M. (2020). "Singlet Fission in Carbene-Derived Diradicaloids". Angewandte Chemie International Edition. 59 (20): 7906–7914. doi:10

Singlet fission

Singlet_fission

Stable phosphorus radicals

Family of chemical compounds

(open-shell singlet) or not interact at all (two-doublet). Biradicaloids/diradicaloids are a class of biradicals with significant radical centre interaction

Stable phosphorus radicals