scholarly journals The Hydrolysis of 4-Amino- and 4-Dimethylaminobenzene Sulfonyl Chlorides: An Unprecedented Case of Independence of Reactivity from pH

2011 ◽  
Vol 13 (10) ◽  
pp. 2797-2797
Author(s):  
Giorgio Cevasco ◽  
Anna Pia̧tek ◽  
Sergio Thea
Keyword(s):  
Sulfonyl Chlorides ◽  
Hydrolysis Of

Heat capacity of activation for the hydrolysis of methanesulfonyl chloride and benzenesulfonyl chloride in light and heavy water

1969 ◽  
Vol 47 (22) ◽  
pp. 4199-4206 ◽  
Author(s):  
R. E. Robertson ◽  
B. Rossall ◽  
S. E. Sugamori ◽  
L. Treindl
Keyword(s):  
Heat Capacity ◽  
Free Energy ◽  
Temperature Dependence ◽  
Heavy Water ◽  
Bond Formation ◽  
Sulfonyl Chlorides ◽  
Benzenesulfonyl Chloride ◽  
Methanesulfonyl Chloride ◽  
Hydrolysis Of ◽  
Parameter Temperature Dependence

Rates of solvolysis of methanesulfonyl chloride and benzenesulfonyl chloride have been determined in H2O and D2O. The free energy, enthalpy, entropy, and heat capacity of activation were calculated. The exceptional accuracy of the data permitted an estimation of dΔCp≠/dT from a four parameter temperature dependence of the kinetic rates.From these data we conclude that both sulfonyl chlorides hydrolyse by the same mechanism (Sn2) The change in R from CH3 to C6H5 in RSO2Cl did not alter ΔCp≠ but ΔS≠ (20°) was changed from −8.32 to −13.25 cal deg−1 mole−1, respectively. The significance of this difference is attributed to the probability of bond formation rather than to differences in solvent reorganization.

Solvation bifunctional catalysis of the Hydrolysis of Sulfonyl Chlorides by hydration complexes of 2-Propanol: influence of the substrate structure

2005 ◽  
Vol 46 (1) ◽  
pp. 29-36 ◽  
Author(s):  
S. N. Ivanov ◽  
A. V. Mikhailov ◽  
B. G. Gnedin ◽  
A. Yu. Lebedukho ◽  
V. P. Korolev
Keyword(s):  
Bifunctional Catalysis ◽  
Sulfonyl Chlorides ◽  
Substrate Structure ◽  
Hydrolysis Of

The Hydrolysis of 4-Amino- and 4-Dimethylaminobenzene Sulfonyl Chlorides: An Unprecedented Case of Independence of Reactivity from pH

2011 ◽  
Vol 13 (4) ◽  
pp. 668-671 ◽  
Author(s):  
Giorgio Cevasco ◽  
Anna Pia̧tek ◽  
Sergio Thea
Keyword(s):  
Sulfonyl Chlorides ◽  
Hydrolysis Of

Solvation bifunctional catalysis of the hydrolysis of sulfonyl chlorides by hydration complexes of 2-propanol: influence of the substrate structure

2005 ◽  
Vol 46 (1) ◽  
pp. 29-36 ◽  
Author(s):  
S. N. Ivanov ◽  
A. V. Mikhailov ◽  
B. G. Gnedin ◽  
A. Yu. Lebedukho ◽  
V. P. Korolev
Keyword(s):  
Bifunctional Catalysis ◽  
Sulfonyl Chlorides ◽  
Substrate Structure ◽  
Hydrolysis Of

Fine Structural Localization of Acyltransferases Involved in Lipid Synthesis in Intestinal Mucosa.

1970 ◽  
Vol 28 ◽  
pp. 54-55
Author(s):  
R. J. Barrnett ◽  
J. A. Higgins
Keyword(s):  
Smooth Endoplasmic Reticulum ◽  
Lipid Synthesis ◽  
Mucosal Cell ◽  
Structural Localization ◽  
Morphological Studies ◽  
Mucosal Cells ◽  
Initial Appearance ◽  
Sh Group ◽  
Hydrolysis Of ◽  
Intestinal Mucosal Cells

The main products of intestinal hydrolysis of dietary triglycerides are free fatty acids and monoglycerides. These form micelles from which the lipids are absorbed across the mucosal cell brush border. Biochemical studies have indicated that intestinal mucosal cells possess a triglyceride synthesising system, which uses monoglyceride directly as an acylacceptor as well as the system found in other tissues in which alphaglycerophosphate is the acylacceptor. The former pathway is used preferentially for the resynthesis of triglyceride from absorbed lipid, while the latter is used mainly for phospholipid synthesis. Both lipids are incorporated into chylomicrons. Morphological studies have shown that during fat absorption there is an initial appearance of fat droplets within the cisternae of the smooth endoplasmic reticulum and that these subsequently accumulate in the golgi elements from which they are released at the lateral borders of the cell as chylomicrons.We have recently developed several methods for the fine structural localization of acyltransferases dependent on the precipitation, in an electron dense form, of CoA released during the transfer of the acyl group to an acceptor, and have now applied these methods to a study of the fine structural localization of the enzymes involved in chylomicron lipid biosynthesis. These methods are based on the reduction of ferricyanide ions by the free SH group of CoA.

Lattice imaging and pore structure of β ferric oxyhydroxide

1978 ◽  
Vol 36 (1) ◽  
pp. 264-265
Author(s):  
T. Baird ◽  
J.R. Fryer ◽  
S.T. Galbraith
Keyword(s):  
Electron Microscopy ◽  
Room Temperature ◽  
Bulk Material ◽  
Model Structure ◽  
Bulk Crystals ◽  
Lattice Imaging ◽  
Thin Sections ◽  
Ferric Oxyhydroxide ◽  
Resolution Electron ◽  
Hydrolysis Of

Introduction Previously we had suggested (l) that the striations observed in the pod shaped crystals of β FeOOH were an artefact of imaging in the electron microscope. Contrary to this adsorption measurements on bulk material had indicated the presence of some porosity and Gallagher (2) had proposed a model structure - based on the hollandite structure - showing the hollandite rods forming the sides of 30Å pores running the length of the crystal. Low resolution electron microscopy by Watson (3) on sectioned crystals embedded in methylmethacrylate had tended to support the existence of such pores.We have applied modern high resolution techniques to the bulk crystals and thin sections of them without confirming these earlier postulatesExperimental β FeOOH was prepared by room temperature hydrolysis of 0.01M solutions of FeCl3.6H2O, The precipitate was washed, dried in air, and embedded in Scandiplast resin. The sections were out on an LKB III Ultramicrotome to a thickness of about 500Å.

Palladium-catalyzed carbonylative transformation of aryl iodides and sulfonyl chlorides: convenient access to thioesters

2020 ◽  
Vol 7 (6) ◽  
pp. 885-889 ◽  
Author(s):  
Xinxin Qi ◽  
Zhi-Peng Bao ◽  
Xiao-Feng Wu
Keyword(s):  
Sulfonyl Chlorides ◽  
Aryl Iodides ◽  
Palladium Catalyzed ◽  
Convenient Access

A palladium-catalyzed carbonylative transformation of aryl iodides and sulfonyl chlorides to thioesters has been studied.

Hydrolysis of Ethyl 3-(1-pyrenyl)propanoate

10.1039/sp513 ◽  
2011 ◽  
Author(s):  
Anish Mistry
Keyword(s):  
Hydrolysis Of
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