Morgan; Ackerman, Journal of the Chemical Society, 1923, vol. 123, p. 1315
作者:Morgan、Ackerman
DOI:——
日期:——
3,5-Dimethylpyrazole promoted sulfonation of acetic anhydride by H2SO4 to sulfoacetic acid and methanedisulfonic acid, and crystal structures of the complexes with Co2+, Zn2+, Ba2+, Pb2+ and Cs+
作者:Sarut Jianrattanasawat、Gellert Mezei
DOI:10.1016/j.ica.2011.12.022
日期:2012.4
Sulfuric acid can sulfonate acetic anhydride (but not acetic acid) to sulfoacetic acid, and also to methanedisulfonic acid in the presence of 3,5-dimethylpyrazole. Under the experimental conditions employed, sulfonation of 3,5-dimethylpyrazole with concentrated sulfuric acid in acetic anhydride/acetic acid as solvent leads to a mixture of approximately 47 mol% 3,5-dimethylpyrazole-4-sulfonic acid, 34 mol% sulfoacetic acid and 19 mol% methanedisulfonic acid, as determined by H-1 NMR spectroscopy. The Co2+, Zn2+, Ba2+ and Pb2+ complexes of the sulfoacetate ligand, as well as the Cs+ complex of the methanedisulfonate ligand were isolated upon crystallization of the compounds obtained from the reaction of the above ligand mixture with the corresponding metal oxide or carbonate in water. Single-crystal X-ray crystallography of Co(O3SCH2CO2)(H2O)(3), Zn(O3SCH2CO2)(H2O)(3), Ba(O3SCH2CO2)(H2O), Pb(O3SCH2CO2)(H2O) and Cs-2(O3SCH2SO3) reveals a variety of new coordination modes of the two sulfonated ligands within those structures. (C) 2011 Elsevier B. V. All rights reserved.
New method for the sulfonation of pyrazoles
作者:I. I. Grandberg、N. L. Nam、V. I. Sorokin
DOI:10.1007/bf02291934
日期:1997.5
Layered Inorganic–Organic 3,5-Dimethylpyrazole-4-Sulfonate Films for Protection of Copper Surfaces against Corrosion
作者:Wisam A. Al Isawi、Sarut Jianrattanasawat、Eleftherios Tripodianos、Konstantinos D. Demadis、Alexander M. Kirillov、Matthias Zeller、Gellert Mezei
DOI:10.1021/acs.cgd.1c00683
日期:2021.9.1
corrosion protection in comparison to the corresponding pyrazole-4-sulfonate complexes. The latter result is corroborated by the less compact and less robust thinfilms formed by metal–L compounds, as indicated by scanning electron microscopy/energy dispersive X-ray spectroscopy (SEM/EDS) measurements, and the weaker acidity of HL, which allows for easier protonation of the conjugate base L– in metal–L