steric strain वाक्य
उदाहरण वाक्य
मोबाइल
- The resulting steric strain causes such compounds to be unstable and highly reactive.
- In these cases, steric strain is often the driving force for the selectivity.
- The effects of steric strain in the reaction of trialkylamines and trimethylboron were studied by Brown et al.
- These types of compounds usually take a more linear conformation to avoid the steric strain between the substituents.
- Due to the high steric strain present in benzvalene, the pure compound easily detonates, for example by scratching.
- This selectivity is due to steric strain in the transition state that develops for one enantiomer but not for the other.
- The shift in equilibrium was attributed to steric strain between the alkyl groups of the amine and the methyl groups on boron.
- In this case, the diaxial conformation is effectively prevented by its high steric strain ( four gauche interactions more than the diequatorial ).
- The steric strain between the two terminal methyl groups accounts for the difference in energy between the two similar, yet very different conformations.
- Relief of steric strain dictates that the alkyl residue R of the enamine and the imine group are antiperiplanar on approach which locks in the syn mode of addition.
- The chair conformation is the favored configuration, because in this conformation, the steric strain, eclipsing strain, and angle strain that are otherwise possible are minimized.
- Alkyne insertion occurs so that the large substituent on the alkyne avoids steric strain from the short developing carbon-carbon bond by interacting with the longer carbon-palladium bond.
- Van der Waals strain, or steric strain, occurs when atoms are forced to get closer than their tert-butyl groups take up much more space than methyl groups and often experience greater steric interactions.
- The reason is that this molecule is very unstable because its amide group has the amine lone pair and the carbonyl group not properly aligned, as may be expected for an amide, as a result of steric strain.
- An example of interactions within a molecule that would lead to steric strain, leading to a shift in equilibrium from boat to chair, is the interaction between the two methyl groups in " cis "-1, 4-dimethylcyclohexane.
- Along this same vein, allenyl vinyl ketones of the type studied extensively by Marcus Tius of the University of Hawaii show dramatic rate acceleration due to the removal of ?-hydrogens, obviating a large amount of steric strain in the s-cis conformer.
- The greater variation in the substituted ligand is attributed to the distortions necessary to relieve the steric strain imposed by neighbouring " tert "-butyl substituents; despite these variations, the data demonstrate that the substituted cyclopentadienyl is also ? 5-coordinated.
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