Results 1 to 10 of about 263,856 (289)

Steric Effects of N-Alkyl Group on the Base-Induced Nitrogen to Carbon Rearrangement of Orthogonally Protected N-Alkyl Arylsulphonamides [PDF]

Molecules
The rearrangement of a total of 56 members of 22 series of orthogonally protected N-alkyl arylsulphonamides of general structure 4-XC6H4SO2NR1CO2R2 [X = H, CH3, F, Cl, Br, CH3O, CN, CF3 or C(CH3)3; R1 = CH3, CH2CH3, CH2CH2CH3, CH(CH3)2 or CH2CH(CH3)2; R2
Amie Saidykhan, Jenessa Ebert, Nathan W. Fenwick, William H. C. Martin, Richard D. Bowen   +4 more
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Electrostatic and steric effects underlie acetylation-induced changes in ubiquitin structure and function [PDF]

Nature Communications, 2022
Ubiquitin is not only a posttranslational modifier but itself is subject to modifications, such as acetylation. Characterization of distinct acetylated ubiquitin variants reveals that each acetylation site has a particular impact on ubiquitin structure ...
Simon Maria Kienle, Tobias Schneider, Katrin Stuber, Christoph Globisch, Jasmin Jansen, Florian Stengel, Christine Peter, Andreas Marx, Michael Kovermann, Martin Scheffner   +9 more
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A database of steric and electronic properties of heteroaryl substituents [PDF]

Scientific Data
Heteroaryl substituents are important building blocks of functionalized organic compounds in drug discovery, materials science, and catalysis. Quantitative descriptions of steric and electronic properties of heteroaryl substituents are essential in ...
Turki M. Alturaifi, Grace E. Scofield, Shengchun Wang, Peng Liu   +3 more
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Insights on tert-butyl alkylation effects on fluorobenzene

Scientific African, 2021
Directing effects of substituents on the benzene ring, ortho and para directors by electron donating groups and meta directors using electron withdrawing groups have been studied and reported widely. In particular and for many years, the directing effect
Lewis Mtashobya
doaj   +1 more source

A Computational Chemistry Investigation of the Influence of Steric Bulk of Dithiocarbamato-Bound Organic Substituents upon Spodium Bonding in Three Homoleptic Mercury(II) Bis(N,N-dialkyldithiocarbamato) Compounds for Alkyl = Ethyl, Isobutyl, and Cyclohexyl

Inorganics, 2023
Three homoleptic Hg(S2CNR2)2, for R = ethyl (1), isobutyl (2), and cyclohexyl (3), compounds apparently exhibit a steric-dependent supramolecular association in their crystals.
Rosa M. Gomila, Edward R. T. Tiekink, Antonio Frontera   +2 more
doaj   +1 more source

Steric Effects on Space Electroosmotic Thrusters in Soft Nanochannels

Mathematics, 2021
The influence of steric effects on the performances of space electroosmotic thrusters (EOTs) was numerically delineated in soft nanochannels for which its walls are covered with polyelectrolyte materials.
Jiaxuan Zheng, Beinan Jia, Yongjun Jian
doaj   +1 more source

Steric and Slippage Effects on Mass Transport by Using an Oscillatory Electroosmotic Flow of Power-Law Fluids

Micromachines, 2021
In this paper, the combined effect of the fluid rheology, finite-sized ions, and slippage toward augmenting a non-reacting solute’s mass transport due to an oscillatory electroosmotic flow (OEOF) is determined.
Ruben Baños, José Arcos, Oscar Bautista, Federico Méndez   +3 more
doaj   +1 more source

A Highly Efficient Regioselective Addition of Acetylides to Enediones Based on Steric Effects

Molecules, 2013
A simple and efficient strategy for the synthesis of 1-ethynylcyclohex-2-enol derivatives was developed utilizing regioselective addition of acetylides to enediones based on steric effects.
Zhaohai Qin, Yumei Xiao, Shijie Du, Xiaoyong Yuan, Dongyan Yang, Chuan Wan, Xiaoqiang Han   +6 more
doaj   +1 more source

UNA PROPUESTA PARA ENSEÑAR EL EFECTO DE LA FORMA DE LAS MOLÉCULAS EN LA REACTIVIDAD QUÍMICA

Química Nova, 2015
We address the concept of steric effect in the pursuit of establishing quantitative correlations between reactivity of molecules and their molecular shape.
José G. Cermeños-Estrada, John J. Pérez-Moncada, Daniel Barragán   +2 more
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π-Bond Screening in Benzonorbornadienes: The Role of 7-Substituents in Governing the Facial Selectivity for the Diels-Alder Reaction of Benzonorbornadienes with 3,6-Di(2-pyridyl)-s-Tetrazine

Molecules, 2001
Benzonorbornadiene 21, 7-spirocyclopropylbenzonorbornadiene 23, 7,7-dimethylbenzonorbornadiene 25, and 7-spirocyclopentylbenzonorbornadiene 27 have been reacted with 3,6-di(2-pyridyl)-s-tetrazine (rate: 21>23>25=27) to form symmetrical 4,5 ...
Peter A. Harrison, Ronald N. Warrener
doaj   +1 more source