例句與造句

1. Reactions speed up with polar aprotic solvents and higher reaction temperatures.
2. Polar aprotic solvents should be avoided for the conjugate addition step.
3. Sulfolane is a polar aprotic solvent, and it is readily soluble in water.
4. The compound is sometimes used as a polar aprotic solvent in research chemistry and as a reagent in chemical synthesis.
5. Polar aprotic solvents are generally incompatible with strong bases, such as Grignard reagents or " n "-butyllithium.
6. It's difficult to find polar aprotic solvent in a sentence. 用polar aprotic solvent造句挺難的
7. Commonly used solvents are polar aprotic solvents such as DMF as well as in non-polar aprotic solvents such as toluene.
8. Commonly used solvents are polar aprotic solvents such as DMF as well as in non-polar aprotic solvents such as toluene.
9. It can be used as a polar aprotic solvent, with better hydrocarbon solubility than other amide solvents such as dimethylformamide ( DMF ).
10. But you can measure it via iodide isotopes ) in 17 minutes in methanol, and 8.7 seconds in Dimethylformamide ( a polar aprotic solvent ).
11. The first stage forms a soluble and fusible high-molecular-weight poly ( amic acid ) in a polar aprotic solvent such as NMP or N, N-dimethylacetamide.
12. Butadiene is typically isolated from the other four-carbon hydrocarbons produced in steam cracking by extractive distillation using a polar aprotic solvent such as acetonitrile, N-methylpyrrolidone, furfural, or dimethylformamide, from which it is then stripped by distillation.
13. As such it is commercially available as a solution in polar aprotic solvents such as THF and ether, however for small scale use ( less than 50 mmol ), it is common and more cost effective to prepare LDA " in situ ".
14. Solvent can also have a significant effect on the thermodynamic equilibrium of a system, for instance as in the case of polar aprotic solvents, such as methylene chloride, the enol form is less favored due to the interaction between the polar solvent and the polar diketone.
15. Which makes it a bit more difficult to cram for my orgo final . . . I'm trying to keep track on when you would have to use aqueous solvents and what polar aprotic solvents to use, especially when you're using hydrogen halide gases.
16. "' Hexamethylphosphoramide "', often abbreviated HMPA, is a phosphoramide ( i . e . an amide of phosphoric acid ) with the formula [ ( CH 3 ) 2 N ] 3 PO . This colorless liquid is a useful polar aprotic solvent and additive in organic synthesis.