Acids methanoic

Methanoic (formic) acid decomposes on metal surfaces according to the equation 

This reaction has been described as belonging to the museum of catalysis , and indeed it has not been studied for a number of decades. This short section therefore relies entirely on work performed before 1970. 

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HCOOCHjCHj. Colourless liquid with the odour of peach-kernels b.p. 54 C, Prepared by boiling ethanol and methanoic acid in the presence of a little sulphuric acid the product is diluted with water and the insoluble ester separated and distilled. Used as a fumigant and larvicide for dried fruits, tobacco and foodstuffs. It is also used in the synthesis of aldehydes. 

When heated with sulphuric acid the acid is decomposed to CO, CO2 and H2O. Gives methanoic acid when heated with glycerin. Forms both acid and neutral salts. The normal... 

CH2 CH-0-CH CH2 Colourless inflammable liquid, with a characteristic ethereal odour, b.p. 28-31°C. Prepared by the action of KOH on 2,2 -dichiorodiethyl ether. It is unstable, breaking down to methanal and methanoic acid. 

Carbon monoxide is formed by the incomplete combustion of carbon. It is prepared in the laboratory by dropping methanoic (formic) acid into warm concentrated sulphuric acid the latter dehydrates the methanoic acid ... 

Although carbon monoxide appears to be the anhydride of methanoic acid it does not react with water to give the acid however, it will react with sodium hydroxide solution above 450 K, under pressure, to give sodium methanoate ... 

Methanoic acid Ethanoic acid Octadecanoic acid 2 Hydroxypropanoic acid... 

Formic acid [64-18-6] (methanoic acid) is the first member of the homologous series of alkyl carboxyHc acids. It occurs naturally ia the defensive secretions of a number of insects, particularly of ants. Although the acid nature of the vapors above ants nests had been known since at least 1488, the pure acid was not isolated until 1671, when the British chemist John Ray described the isolation of the pure acid by distillation of ants (1). This remained the main preparative method for more than a century until a convenient laboratory method was discovered by Gay-Lussac (2). The preparation of formates using carbon monoxide was described by Berthelot in 1856. 

Nucleophilic opening of oxiranes to give ultimately 1,2-diols is usually effected without isolation of the oxirane oxiranation (epoxidation) of alkenes with unbuffered peroxy-ethanoic acid or hydrogen peroxide in methanoic acid (Section 5.05.4.2.2(/)) tends to give monoesters of 1,2-diols (e.g. 53), which can be hydrolyzed to the diols (Scheme 46). 

Formic acid Methanoic acid 1.35 CH,0, Trimethylamine 158 C3H9N... 

Formalin Methanoic acid Range oil kerosene Diesel fuel, light Domestic fuel oil... 

Formic acid (methanoic acid, HCOOH). Use at only 120 °F (49... 

Methanoic acid, HCOOH, forms dimers in the gas phase. Propose a reason for this behavior. 

Carboxylic acids are named systematically by replacing the -e of the parent hydrocarbon by the suffix -oic acid the carbon atom of the carboxyl group is included in the count of atoms to determine the parent hydrocarbon molecule. Thus, formic acid is formally methanoic acid, and acetic acid is ethanoic acid. 

We should thus expect the equilibrium to be shifted to the left compared with that for methanoic acid/methanoate anion, and it is in fact found that the pKa of ethanoic acid is 4-76, compared with 3-77 for methanoic acid. However, the degree of structural change effected in so small a molecule as methanoic acid by replacement of H by CH3 makes it doubtful whether so simple an argument is really valid it could well be that the relative solvation possibilities in the two cases are markedly affected by the considerably different shapes of, as well as by the relative charge distribution in, the two small molecules. 

Methanoic acid and methanoates were amongst the most effective donors used for reduction of alkenes in aqueous solution, using Rh, Ru, Pt, and Pd complexes of (115), the most active catalyst being [RuCl2(115)2].344... 

Methanal, f31 Methanoic acid, f36 Methenamine, h49 Malononitrile dimer, a267 Methone, d596... 

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