Which of the following is a polar aprotic solvent? A) water B) ammonia C) acetic acid D) acetone E) methanol Aprotic Solvents: In the word "aprotic", the prefix a means without or absence of: Aprotic solvents are solvents that do not have...
How do you know which one is more polar between different carotenoids? Why is SiH_4 non polar? How do you determine which dyes are more polar than others? Out of acetone and ethanol, which solvent is more polar? Explain why. Which of the following substances are extremely cold and can ...
Polar aprotic solvents such as acetone, tetrahydrofuran, acetonitrile, and dimethylformamide resulted in slow and controlled polymer swelling, inducing conversion of SP to the colored merocyanine. This suggests control of the mechanical activation through swelling and not just standard mechanical extension ...
N,N-Dimethylacetamide is a highly polar aprotic solvent, micro ammonia odor, very strong dissolving power, soluble wide, miscible with water, aromatics, esters, ketones etc... Jul 24,2020Amides What is Chlorotrimethylsilane? Chlorotrimethylsilane, also known as Trimethylsilyl chloride is an organosili...
DMAP (m.p. 112-113°C) and PPY (m.p. 57-58°C) are colorless, crystalline substances which are very soluble in methanol, ethyl acetate, chloroform, methylene chloride, 1,2-dichloroethane, acetone, and acetic acid and less soluble in cold hexane, cyclohexane, and water. DMAP can be rec...
One application of 3-nitrophthalonitrile is its use in the synthesis of 3-alkoxyphthalonitrile. By reacting 3-nitrophthalonitrile with an alcohol in the presence of a basic catalyst and aprotic polar solvent, high-yield and high-purity 3-alkoxyphthalonitrile can be obtained. This compound serves...
As examples of such treatment may be mentioned inter alia heating the membrane, preferably in a substantially dry state, and preferably above the Tg of the polymer, under an inert atmosphere; and treatment with a polar aprotic solvent, for example acetone, dimethyacetamide (DMA), ...
Reaction of DMAP with acetylenedicarboxylic acid leads spontaneously to the bis-adduct in high yields. On reaction with perbenzoic acid the strongly polar N-oxide is formed. Nitration of DMAP with HNO3/H2SO4 gives the 3-nitro derivatives in 81 % yield and, under forcing condition; the 3,5...
During the optimization it was observed that the reaction did not proceed in solvents like acetone, 1,4-dioxane, acetonitrile (Table 1, entries 2, 3, and 4). The use of polar aprotic solvent, such as DMSO gave a poor yield of the product (25%) (Table 1, entry 5). Switching the ...
Suitable inert solvents are, for example, protic-polar and aprotic solvents, which can be used by themselves or in mixtures of at least two solvents. Examples are: ethers (dibutyl ether, tetrahydrofuran, dioxane, ethylene glycol monomethyl or dimethyl ether, ethylene glycol monoethyl or diethyl eth...