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Topics in Current Chemistry

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Topics in Current Chemistry ( topics-current-chemistry )

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Homoatomic Sulfur Cations 145 Table 2 Selected reaction enthalpies and free energies of dissociation reactions of Sn2+ (n=4, 6, 8, 10) in the gas phase and in SO2 solution at 298 K [in kJ mol􏱐1]. Some equilibria were also assessed using HF (DC=83) or oleum (DC=110) as solvent. Exergonic Gibbs energies of reaction in solution are printed in bold Eq. Dissociation reactions of Sn2+ [kJ/mol] DrH298 DrG298 􏱐257 􏱐308 DrG298 DrG298 DrG298 (SO2) (HF) (Oleum) (a) S42+(g)!2 S2·+(g) (b) S62+(g)!2 S3·+(g) (c) S62+(g)!1/2 S42+(g)+S4·+(g) (d) S62+(g)!2/3 S42+(g)+2/3 S5·+(g) (e) S82+(g)!2 S4·+(g) (f) S82+(g)!S3·+(g)+S5·+(g) (g) S82+(g)!1/2 S62+(g)+S5·+(g) (h) S82+(g)!2/3 S62+(g)+1/3 S5·+(g)+1/3 S7·+(g) (i) S82+(g)!3/4 S62+(g)+1/2 S7·+(g) (j) S82+(g)!0.5 [S42+(g)+S5·+(g)+S7·+(g)] (k) S102+(g)!2 S5·+(g) 􏱐93 􏱐157 􏱐84 􏱐110 􏱐58 􏱐78 +58 – – +163 – – 􏱐14 – – 􏱐39 – – 􏱐170 􏱐224 􏱐135 􏱐200 􏱐89 􏱐121 􏱐30 􏱐51 0 􏱐15 􏱐43 􏱐74 􏱐268 􏱐337 +25 +41 +42 +68 – – +2.22 +13 +17 +17 +23 +24 +24 􏱐5.15 +2.18 􏱐6 – – 􏱐80 – –

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