25331-56-0Relevant academic research and scientific papers
The generality of architectural isomerism in designer inclusion frameworks
Holman,Martin,Parker,Ward
, p. 4421 - 4431 (2001)
We describe herein new structural isomers of a lamellar host system based on organodisulfonate "pillars" that connect opposing hydrogen-bonded sheets, consisting of topologically complementary guanidinium (G) ions and sulfonate (S) groups, to generate inc
Methylation of polymethylbenzenesulfonic acids by hexamethylbenzene and pentamethylbenzenesulfonic acid in concentrated sulfuric acid
Cerfontain, Hans,Koeberg-Telder, Ankie
, p. 162 - 167 (2007/10/02)
The methylation of a series of polymethylbenzenes (PoMB's) or their sulfonic acids by added hexamethylbenzene (HMB) and pentamethylbenzene-1-sulfonic acid (PeMB-1-S) as reagents in 95.5 and 98.4 percent H2SO4 as solvent has been studied under homogeneous conditions.HMB effects methylation of 2,4,6-trimethylbenzene-1-sulfonic acid (2,4,6-TrMB-1-S),2,3,4,6-tetramethylbenzene-1-sulfonic acid (2,3,4,6-TeMB-1-S) and 2,3,5,6-TeMB-1-S, but not of the sulfonic acids of 1,3-dimethylbenzene (1,3-DMB), 1,2,3-TrMB, 1,2,4-TrMB, and 1,2,3,4-TeMB.PeMB-1-S is less reactive as methylating reagent than HMB.The observed substrate reactivity towards methylation by HMB was observed to decrease in the order 2,3,4,6-TeMB-1-S ca. 2,3,5,6-TeMB-1-S > 2,4,6-TrMB-1-S >> 2,3,4,5-TeMB-1-S, and towards methylation by PeMB-1-S to decrease in the order PeMB-1-S >> 2,4,6-TrMB-1-S.On the basis of a comparison of these orders of substrate reactivities with those predicted for the series of PoMB-1-sulfonates and the corresponding PoMB's, it is concluded that the substrate species undergoing methylation are the PoMB's and corresponding sulfonates.
Kinetics of hydrolysis of aromatic mono- and disulfonyl chlorides
Sanecki, Przemyslaw,Rokaszewski, Edward
, p. 2263 - 2267 (2007/10/02)
A continuous polarografic method of recording instantaneous concentrations of - SO2Cl groups in an aqueous acetic acid system containing CH3CO2Na has been elaborated.Ten model monosulfonyl chlorides underwent hydrolysis according to pseudo-first order kinetics (20percent H2O, 80percent v.v.CH3CO2H, 0.5 mol/dm3 CH3CO2Na).Plots of hydrolysis for seven disulfonyl dichlorides with different number of - CH3 groups have been determined.Pseudo-first order rate constants for two consecutive reactions of hydrolysis (k1 and k2) have been computed and the influence of -SO2Cl and -SO3- groups on the reactivity of the second group - SO2Cl has been discussed.The mechanism of nucleophilic substitution has also been discussed.
