2026-10-14T14:56:13Z https://api.figshare.com/v2/oai

oai:figshare.com:article/34003659 2026-09-26T16:08:21Z category_1 category_4 category_7 category_19 category_272 category_873 category_45 category_734 portal_63 item_type_3 month_year_09_2026

Extension of the Pnictinous Acid Series: Rational Synthesis of a Stibinous Acid and Exploration of Its Reactivity Bi Youan E. Tra (16995816) Addis Getahun (20322967) Timothy C. Johnstone (1312911) Biophysics Biochemistry Medicine Pharmacology Environmental Sciences not elsewhere classified Chemical Sciences not elsewhere classified Sociology Biological Sciences not elsewhere classified strong base dbu transient stibinic acid pnictinous acid series reported rational syntheses first controlled synthesis molecular stibinous acid terminal e – probed via reaction 2 </ sub h stibinic acids group oxyacids play sboh stibinous acids stibinous acid rational synthesis hydroxyl group weakly acidic valent r valent oxyacids therefore investigated produced oxo molecules belonging lewis basicity less susceptible important role free r coordination spheres brønsted acidity bridged clusters The oxyacids of the heavy group 15 elements remain underexplored despite the important role that main-group oxyacids play in academic and industrial chemistry. Higher-valent oxyacids of heavier main-group elements readily polymerize because of their ability to expand their coordination spheres and the polarity of their terminal E–O (E = P, As, Sb, Bi) bonds. As a result, no free R₂SbO₂H stibinic acids have yet been prepared. Lower-valent R₂SbOH stibinous acids should be less susceptible to such polymerization, but there are no reported rational syntheses of molecules belonging to this class. We report here the first controlled synthesis and isolation of a molecular stibinous acid, Dipp₂SbOH, where Dipp = 2,6-diisopropylphenyl. We also report an initial exploration of the chemistry of this class of compounds, including their Brønsted acidity and Lewis basicity. The hydroxyl group of Dipp₂SbOH is weakly acidic as probed via reaction with the very strong base DBU. We also prepared the analogous arsinous acid Dipp₂AsOH and demonstrated that it can support oxidation to the well-defined monomeric arsinic acid Dipp₂AsO₂H. We therefore investigated the oxidation of Dipp₂SbOH. Reaction with PhIO and H₂O₂ produced oxo-bridged clusters, suggesting the formation of a transient stibinic acid of the form Dipp₂SbO₂H. 2026-09-26T00:00:00Z Dataset Dataset 10.1021/acs.inorgchem.6c02995.s002 https://figshare.com/articles/dataset/Extension_of_the_Pnictinous_Acid_Series_Rational_Synthesis_of_a_Stibinous_Acid_and_Exploration_of_Its_Reactivity/34003659 CC BY-NC 4.0