Why are methyl esters more volatile?

Esters are more polar than ethers but less polar than alcohols. Because of their lack of hydrogen-bond-donating ability, esters do not self-associate. Consequently, esters are more volatile than carboxylic acids of similar molecular weight.

What can methyl esters be used for?

Industrial Applications for Plant Oils and Lipids The methyl esters of vegetable oils are excellent solvents for inks, polymers, and oils, with low volatility and good solubility. They are widely used to replace mineral spirits in the textile screen ink industry and graphics arts industries.

What is a methyl ester group?

Fatty acid methyl esters (FAME) are a type of fatty acid ester that are derived by transesterification of fats with methanol. FAME are typically produced by an alkali-catalyzed reaction between fats and methanol in the presence of base such as sodium hydroxide, sodium methoxide or potassium hydroxide.

Are methyl esters volatile?

Fatty acid methyl esters (FAME) are volatile enough to be readily determined by GC.

Why are esters less polar than alcohols?

Esters are polar molecules, but their boiling points are lower than those of carboxylic acids and alcohols of similar molecular weight because there is no intermolecular hydrogen bonding between ester molecules. Esters can form hydrogen bonds through their oxygen atoms to the hydrogen atoms of water molecules.

Is HVO a biodiesel?

HVO (Hydrotreated Vegetable Oil) is based on advanced raw materials such as residues and waste. HVO is a 2nd generation biodiesel and meets the standard EN15940 for paraffin fuels.

Are fatty acid methyl esters polar or nonpolar?

The primary reasons to analyze fatty acids as fatty acid methyl esters include: In their free, underivatized form, fatty acids may be difficult to analyze because these highly polar compounds tend to form hydrogen bonds, leading to adsorption issues.

Is there a direct amidation method for unactivated esters?

Direct amidation of esters is particularly appealing due to the omnipresence of the amide moiety in biomolecules, fine chemicals, and drug candidates. However, efficient methods for direct amidation of unactivated esters are still lacking.

What is amidation in chemistry?

The amidation is a formation reaction of an amide compound (Clason, 1986). According to Kirk and Othmer (1986), when the long chain fatty acids such as lauric acid and stearic acid combined with alkanolamine and heated at 140-160 0C, with or without a catalyst will result an amidation reaction.

Can anilines be used as a source of nitrogen for amide synthesis?

Preliminary mechanistic study indicates a reaction pathway distinct from conventional amidation methods using anilines as nitrogen sources. The work provides a novel and efficient method for amide synthesis.

Can esters be converted into other functional groups?

Because esters are ubiquitous synthetic intermediates, bio-active molecules and materials, direct conversion of the ester group into other functional groups is attractive in organic synthesis.