The cyclopropanation of [60]fullerobenzofurans via electrosynthesis

2017 ◽  
Vol 15 (15) ◽  
pp. 3248-3254 ◽  
Author(s):  
Jun-Jie Wang ◽  
Hao-Sheng Lin ◽  
Chuang Niu ◽  
Guan-Wu Wang
Keyword(s):  
Steric Factor

The regioselective cyclopropanation of dianionic [60]fullerobenzofurans by diethyl dibromomalonate is dominantly controlled by steric factor.

Consistent prediction of streaming potential in non-Newtonian fluids: the effect of solvent rheology and confinement on ionic conductivity

2015 ◽  
Vol 17 (11) ◽  
pp. 7282-7290 ◽  
Author(s):  
Aditya Bandopadhyay ◽  
Suman Chakraborty
Keyword(s):  
Ionic Conductivity ◽  
Streaming Potential ◽  
Steric Factor ◽  
Newtonian Fluids ◽  
Effect Of Solvent

A consistent framework is developed to account for the solvent rheology and steric factor to obtain concentration-dependent ionic conductivity and streaming potential.

Hybrid Pigments Based on Montmorillonite and Anionic Dyes for Leather Finishing

2021 ◽  
Vol 320 ◽  
pp. 198-203
Author(s):  
Anna Bondaryeva ◽  
Olena Mokrousova ◽  
Olena Okhmat
Keyword(s):  
Maximum Level ◽  
Steric Factor ◽  
Anionic Dyes ◽  
Mineral Particles ◽  
High Level ◽  
Leather Finishing ◽  
Positively Charged ◽  
Sodium Form

The work is focused on obtaining hybrid pigments by adsorption of anionic dyes on positively charged montmorillonite. Modification of the sodium form of montmorillonite by chromium hydroxocomplexes was provided to ensure effective adsorption of anionic dyes on the surface of mineral particles. A high level of adsorption of anionic dyes as a result of steric factor was revealed. It was shown that the adsorption of dyes depended on the pH of the medium and was characterized by a maximum level at pH 4.5 – 6.0. The scheme of obtaining hybrid pigments, which were characterized by good сovering ability, resistance to stratification, especially saturated and intense colour was proposed.

The steric factor in the elementary act in the liquid state

1982 ◽  
Vol 17 (3) ◽  
pp. 244-250 ◽  
Author(s):  
V. M. Berdnikov ◽  
A. B. Doktorov
Keyword(s):  
Liquid State ◽  
Steric Factor

Aromatic oxidation by cobaltic acetate in acetic acid

1969 ◽  
Vol 47 (3) ◽  
pp. 387-392 ◽  
Author(s):  
Koichiro Sakota ◽  
Yoshio Kamiya ◽  
Nobuto Ohta
Keyword(s):  
Activation Energy ◽  
Electron Transfer ◽  
Acetic Acid ◽  
Bond Energy ◽  
Hydrogen Abstraction ◽  
Steric Factor ◽  
Benzyl Acetate ◽  
Kcal Mole ◽  
First Order ◽  
Reversible Electron Transfer

A detailed kinetic study of oxidation of toluene and its derivatives by cobaltic acetate in 95 vol% acetic acid is reported. The reaction was found to be profoundly affected by a steric factor and rather insensitive to the C—H bond energy. The order of reactivities of various alkylbenzenes is quite reversal to that of hydrogen abstraction reactions. The reaction was of first-order with respect to toluene, of second-order with respect to cobaltic ion and of inverse first-order with respect to cobaltous ion. The oxidation by cobaltic ion seems to proceed via an initial reversible electron transfer from toluene to cobaltic ion, yielding [Formula: see text] which is oxidized into benzyl acetate by another cobaltic ion. The apparent activation energy for toluene was found to be 25.3 kcal mole−1, and the same activation energy was found for ethylbenzene, cumene, diphenylmethane, and triphenylmethane.

STUDIES ON HOMOGENEOUS FIRST ORDER GAS REACTIONS: XI. THE DECOMPOSITION OF BENZYLIDENE DIACETATE, o-CHLOROBENZYLIDENE DIACETATE AND BENZYLIDENE DIBUTYRATE

1940 ◽  
Vol 18b (8) ◽  
pp. 223-230 ◽  
Author(s):  
N. A. D. Parlee ◽  
J. C. Arnell ◽  
C. C. Coffin
Keyword(s):  
Double Bond ◽  
Steric Factor ◽  
Reverse Reaction ◽  
Breaking Point ◽  
Reaction Velocity ◽  
First Order ◽  
Gas Reactions

Benzylidene diacetate, o-chlorobenzylidene diacetate, and benzylidene dibutyrate decompose unimolecularly at rates given by the equation previously found for crotonylidene diacetate and furfurylidene diacetate, viz., [Formula: see text]. The fact that these esters all have a double bond at the same distance from the breaking point of the molecule is considered significant in connection with their identical reaction velocity, which is about six times that of ethylidene diacetate. Benzylidene diacetate decomposes at the same rate in both the liquid and vapour states to reach an equilibrium given by the equation [Formula: see text]. The reverse reaction with a rate given by [Formula: see text] is characterized by a steric factor of 10−4.

Recognition of steric factor in external association of xanthenocrown-5 and bis-napthalenocrown-6 with bis(benzimidazolium)propane borontetrafluoride

2016 ◽  
Vol 159 ◽  
pp. 141-145 ◽  
Author(s):  
Animesh Karmakar ◽  
Kshama Kundu ◽  
Sabari Ghosh ◽  
Chhanda Mukhopadhyay ◽  
Sandip K. Nayak ◽  
...  
Keyword(s):  
Steric Factor

Steric Factor

2016 ◽  
Author(s):  
Keith J. Laidler
Keyword(s):  
Steric Factor
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