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Free, publicly-accessible full text available January 8, 2027
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Unsatisfied with vibrational and mechanistic discrepancies between three previous investigations, we characterized the P4O potential energy surface with high-level coupled cluster methods for resolution, up to CCSD(T)/cc-pV(T+d)Z.more » « lessFree, publicly-accessible full text available June 17, 2027
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Abstract The 1 : 2 reaction of the imidazole‐based dithiolate (2) with GeCl2 • dioxane in THF/TMEDA gives3, a TMEDA‐complexed dithiolene‐based germylene. Compound3is converted to monothiolate‐complexed (5) and N‐heterocyclic carbene‐complexed (7) germanium(II) dithiolene complexes via Lewis base ligand exchange. A bis‐dithiolene‐based germylene (8), involving a 3c–4e S‐Ge‐S bond, has also been synthesized through controlled hydrolysis of7. The bonding nature of3,5, and8was investigated by both experimental and theoretical methods.more » « less
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The CAAC‐stabilized dithiolene (L0) zwitterion (1), an unusual redox‐active intramolecular frustrated Lewis pair (FLP), activates the B─H bond of boranes via hydride‐coupled reverse electron transfer processes. The reactions of1with catecholborane in THF give a zwitterionic bis(dithiolene)‐based spiroborate (2), in which one sulphur atom (at the C2 carbon) bonds to the (CH2)4OB(O)2C6H4chain due to the catecholborane (CatBH)/SthioureaLewis pair‐mediated THF ring opening. In addition to2, [CAAC(H)]+[(Cat)2B]−, (3), CAAC(H)2, (4), and [CAAC(H)3]+[(Cat)2B]−, (5), are also isolated from these reactions. In addition to synthetic, structural, and spectroscopic data, a plausible reaction mechanism is proposed. This finding provides compelling experimental evidence of FLP‐mediated B─H activation via net proton transfer.more » « lessFree, publicly-accessible full text available February 1, 2027
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