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• W1974714892 endingPage "5316" @default.
• W1974714892 startingPage "5309" @default.
• W1974714892 abstract "Abstract The most stable complexes between squaric acid and its sulfur‐ and selenium‐containing analogues (C 4 X 4 H 2 ; X=O, S, Se) with BeY 2 (Y=H, F) were studied by means of the Gaussian 04 (G4) composite ab initio theory. Squaric acid derivatives are predicted to be very strong acids in the gas phase; their acidity increases with the size of the chalcogen, with C 4 Se 4 H 2 being the strongest acid of the series and stronger than sulfuric acid. The relative stability of the C 4 X 4 H 2 ⋅ BeY 2 (X=O, S, Se; Y=H, F) complexes changes with the nature of the chalcogen atom; but more importantly, the formation of the C 4 X 4 H 2 ⋅ BeF 2 complexes results in a substantial acidity enhancement of the squaric moiety owing to the dramatic electron‐density redistribution undergone by the system when the beryllium bond is formed. The most significant consequence of this acidity enhancement is that when BeF 2 is replaced by BeH 2 , a spontaneous exergonic loss of H 2 is observed regardless of the nature of the chalcogen atom. This is another clear piece of evidence of the important role that closed‐shell interactions play in the modulation of physicochemical properties of the Lewis acid and/or the Lewis base." @default.
• W1974714892 created "2016-06-24" @default.
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• W1974714892 date "2014-03-24" @default.
• W1974714892 modified "2023-10-18" @default.
• W1974714892 title "Spontaneous H₂Loss through the Interaction of Squaric Acid Derivatives and BeH₂" @default.
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• W1974714892 doi "https://doi.org/10.1002/chem.201304259" @default.
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• W1974714892 hasPublicationYear "2014" @default.
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