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• W2023444917 abstract "The aminosulphonic acid complexes cis[Co(en)2{NH2(CH2)nSO−3}Cl]Cl (n = 1, 2), have been prepared and their hydrolysis in basic solution have been investigated. The aminomethylsulphonate complex (k2 = 2053 ± 50 dm3 mol−1 s−, ΔH≠ = 99 ± 2 kJ mol−, ΔS≠ = 151 ± 8 J K− mol− at 298.2 K) is 200-fold more reactive towards base hydrolysis than analogous complexes containing unsubstituted alkylamine or aminocarboxyclic acid ligands, a result which has been interpreted in terms of the relative ease of formation of the aminomethylsulphonate conjugate base complex. The sulphonate groups in both cases are ineffective in competing with water for the vacant coordination site in the five coordinate conjugate base intermediate [Co(en)2{NH(CH2)nSO−3}]−. This situation contrasts with that of the carboxylate group in the analogous glycinate complex which in base hydrolysis at pH > 10 yields a product mixture 46% of which is the chelated glycinate complex [Co(en)2NH2CH2CO2]2+. Competition by carboxylate is negligible in the longer chain aminocarboxylate complexes." @default.
• W2023444917 created "2016-06-24" @default.
• W2023444917 creator A5020388116 @default.
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• W2023444917 date "1980-01-01" @default.
• W2023444917 modified "2023-09-24" @default.
• W2023444917 title "Aminosulphonic acid complexes of cobalt(III). Preparation and base hydrolysis of cis-chlorobis(1,2-diaminoethane)-amino-alkylsulphonatecobalt(III) chlorides and a comparison with the hydrolysis behaviour of analogous aminoalkylcarboxylate complexes" @default.
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• W2023444917 doi "https://doi.org/10.1016/s0020-1693(00)90509-7" @default.
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