Results 211 to 220 of about 75,973 (258)
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Steric Hindrance in Vinyl-Mesitylene
Nature, 1948A NUMBER of workers have observed various anomalous properties in nuclear-substituted derivatives of mesitylene, such anomalies usually being ascribed to restricted rotation about the bond connecting the substituent to the benzene ring caused by the two ortho-methyl - groups.
F. R. BUCK +3 more
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Steric hindrance in butadiene and ethylene
Tetrahedron, 1970Abstract The structure of ethylene, trans - and cis -butadiene was determined theoretically, based on self consistent steric analysis. The calculated structures agree with the known experimental data. The energy path of the cis-trans isomerization of butadiene was calculated both for the ground state and the first excited state.
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Steric hindrance in substituted dibenzofurans
Journal of the Chemical Society, Perkin Transactions 2, 1977Ten alkyl-substituted dibenzofurans (3) have been synthesized by irridiation of the corresponding diphenyl ethers (4). 13C Chemical shift analysis indicates that some of the highly substituted compounds (3d, g–i) are probably twisted out of the molecular plane due to steric interaction of the substituents in the 1 and 9 positions.
Klaus-Peter Zeller, Stefan Berger
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Stochastic Modeling of Steric Hindrance Effects in Biosensors
2018 IEEE SENSORS, 2018Target-receptor binding kinetics is a crucial rate limiting step in many applications related to biochemistry and pharmacology. Often the parameters that dictate the kinetics are obtained from solution based techniques. However, many novel applications related to biosensors require target conjugation on surface bound receptors where steric hindrance ...
Himanshu Garg, Pradeep R. Nair
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STERIC HINDRANCE IN PROPOSED PHOTOISOMERS OF BILIRUBIN
Photochemistry and Photobiology, 1980Abstract— Semi‐empirical potential energy calculations have been used to examine the stabilities of the proposed geometric isomers of bilirubin. The calculations show that for either of the dipyrrole moieties, the ‘anti‐E’ and ‘syn‐E’ planar conformations are sterically unacceptable. The most stable form of the E isomer has the two pyrrole rings almost
A. J. Geddes +2 more
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Steric hindrance in macromolecular solutions
Journal of Polymer Science, 1947AbstractThe same point in the space cannot be occupied simultaneously by two molecules. In a solution of rigid rodlike macromolecules, each molecule prevents its neighbors from occupying certain positions, the whole of which form the forbidden angle. Calculation shows that in the case of rigid, filiform molecules, this angle is large even at very low ...
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Arylglyoxals and Steric Hindrance
Journal of the American Chemical Society, 1939Reynold C. Fuson +2 more
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Steric Hindrance to Planarity in Dye Molecules.
Chemical Reviews, 1947L. G. S. Brooker +4 more
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A new measurement of amine steric hindrance – N exposure
Separation and Purification Technology, 2022W S Winston Ho +2 more
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