Ethyl acetate, an edible solvent used for decaffeination, is a highly polar solvent, which means it has more of an affinity for other water soluble components than chlorinated or non-polar solvents. Decaf-environmental problems For example, a polar solvent e.g DMF and a non-polar solvent e...
aprotic liquid laser 质子惰性液体激光器 dipolar aprotic solvent 【化】 偶极非质子溶剂 G H solvents 【化】 G-H(混合)溶剂(G代表乙二醇,H代表烃溶剂,如烃、醇、氯代烃等) fastness to organic solvents 耐有机溶剂牢度 相似单词 aprotic 【机】 质子惰性的 polar a. 1.北极的,南极的;极地的 2...
Such interpolymer complex formations were examined in several protic and aprotic solvents. The obvious relationship between the complex formation and the dielectric constant of the solvent was eludicated. The effect of hydrophobic interactions ... H Ohno,K Abe,E Tsuchida - 《Die Makromolekulare Chem...
For the average first semester student, these distinctions come up the most in substitution reactions, where hydrogen bonding solvents tend to decrease the reactivity of nucleophiles; polar aprotic solvents, on the other hand, do not. There are 3 types of solvents commonly encountered: nonpolar, po...
M. Aqueous polar aprotic solvents. Efficient sources of nucleophilic oxygen. Journal of Organic Chemistry 1982, 48, 1360-1362.Hutchins, R. O.; Taffer, I. M., Aqueous polar aprotic solvents. Efficient sources of nucleophilic oxygen. The Journal of Organic Chemistry 1983, 48, 1360-1362....
Herein, we report an approach to produce levoglucosenone (LGO) from cellulose in yields up to 51% under mild reaction conditions (170–230 °C; 5–20 mM H2SO4) using polar, aprotic solvents such as tetrahydrofuran (THF). LGO can be used to make a wide variety of chemicals from biomass...
Recovery of an aprotic polar solvent from a saline aqueous solution of this solvent, by a process which consists in desalinating the said solution by electrodialysis and then distilling the desalinated solution. To avoid the precipitation of metal hydroxides during the electrodialysis, the brine is...
ahese polymers showed good solubility in polar aprotic solvents, such as dimethylacetamide (DMAc), dimethylsulfoxide (DMSO), and NMP. The chemical structures of the polymers were confirmed by FT-IR and 1H NMR spectra. hese聚合物在极性aprotic溶剂显示了好可溶性,例如dimethylacetamide (DMAc),二甲亚砜 ...
No kinetic experiments were performed in non-polar solvents. Kinetic experiments in THF using Na+ counterion, cryptated by cryptand [2.2.2], show that the active species is a contact ion pair, the cation being the cryptated Na+.110 The increase in reactivity is easily understood on the ...
It was shown that polyamic acids form similar complexes with aprotic solvents. The isomeric composition of PMA complexes was investigated and isomerization of PMA in solution under mild conditions was observed.DOI: 10.1002/actp.1984.010350410 被引量: 15 ...