例句與造句

1. Typically, electron deficient olefins are oxidized more slowly than electron rich ones.
2. C 60 behaves very much like an electron deficient alkene and readily reacts with electron rich species.
3. This is because the oxidative addition requires an electron rich metal, hence favoring electron donating ligands.
4. Hmm . . . isn't the electron rich triple bond in alkynes a good H + acceptor?
5. They are electron rich moieties and apparently a positively charged moiety cannot be tolerated in this region of the PDE receptor.
6. It's difficult to find electron rich in a sentence. 用electron rich造句挺難的
7. Diazomethane reacts with the electron-poor ethyl acrylate more than a million times faster than the electron rich butyl vinyl ether.
8. JohnPhos is particularly useful for aminations of  neutral or electron rich aryl chlorides with a wide variety of amine coupling partners.
9. For the R 1 substituent an electron rich sulfonamide groups and amide group has shown the best results in receptor binding and activity.
10. When this center is an electron rich carbanion or an alkoxide anion, the presence of the electron-withdrawing substituent has a stabilizing effect.
11. "' The phenyl region "': It seems that an electron rich centre, such as phenyl, needs to be present.
12. Following the extrusion of nitrogen the metal carbene is generated and reacts with an electron rich aromatic substance to reductively regenerate the metal catalyst completing the catalytic cycle.
13. The carbonyl group typically reacts with the electron rich 2-position of the indole but may also react at the C-3 or N-1 positions.
14. In both cases, D ( donor ) is the atom, group, or molecule that is electron rich and donates them to the electron poor species ( H or X ).
15. Lemal proposed an alternative mechanism to account for the reactions observed by Wanzlick by considering the reactivity of the electron rich tetraaminoethylenes  and not the stable carbenes, which at the time were still hypothetical.
16. This is very clear when comparing the relative rates of reaction for styrene and the less electron rich p-nitrostyrene; the more electron rich styrene reactions roughly 40 % faster than p-nitrostyrene.
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