Anna Volkova (Moldova)
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Anna Feodorovna Volkova (russian: Анна Федоровна Волкова; died 1876) was a Russian chemist known for her work in organic chemistry. Volkova was the first chemist to prepare pure ortho-toluene sulfonic acid, its
acyl chloride In organic chemistry, an acyl chloride (or acid chloride) is an organic compound with the functional group . Their formula is usually written , where R is a side chain. They are reactive derivatives of carboxylic acids (). A specific example o ...
, and its
amide In organic chemistry, an amide, also known as an organic amide or a carboxamide, is a compound with the general formula , where R, R', and R″ represent organic groups or hydrogen atoms. The amide group is called a peptide bond when it is ...
(1870). She was the first chemist to synthesize para-tricresol phosphate from
para-cresol ''para''-Cresol, also 4-methylphenol, is an organic compound with the formula CH3C6H4(OH). It is a colourless solid that is widely used intermediate in the production of other chemicals. It is a derivative of phenol and is an isomer of ''o'' ...
, a component of
plasticizer A plasticizer ( UK: plasticiser) is a substance that is added to a material to make it softer and more flexible, to increase its plasticity, to decrease its viscosity, and/or to decrease friction during its handling in manufacture. Plasticiz ...
. Volkova was the first woman to receive a diploma in chemistry (1870), the first woman in the world to publish scientific work in chemistry, and the first woman to be a member of the Russian Chemical Society.


Biography

Since 1869, Volkova worked in the laboratory of Alexander Nikolayevich Engelhardt at the St. Petersburg Forestry Institute; since 1870, in the laboratory of P. A. Kochube. She attended D. I. Mendeleev's classes through the St. Petersburg public courses. In 1870, Volkova published an article where she first described the production of pure ortho-toluene sulfonic acid, its acyl chloride and amide; later, her discovery of the acyl chloride and amide was used as the basis for the production of
saccharine Saccharin (''aka'' saccharine, Sodium sacchari) is an artificial sweetener with effectively no nutritional value. It is about 550 times as sweet as sucrose but has a bitter or metallic aftertaste, especially at high concentrations. Saccharin is u ...
. By reacting toluene sulfonic acids with the base, Volkova obtained the corresponding
cresol Cresols (also hydroxytoluene or cresylic acid) are a group of aromatic organic compounds. They are widely-occurring phenols (sometimes called ''phenolics'') which may be either natural or manufactured. They are also categorized as methylphenols. ...
s, thereby facilitating the
sulfonic acid In organic chemistry, sulfonic acid (or sulphonic acid) refers to a member of the class of organosulfur compounds with the general formula , where R is an organic alkyl or aryl group and the group a sulfonyl hydroxide. As a substituent, it is kn ...
s discovery. Volkova was the first to synthesize para-tricresol phosphate from
para-cresol ''para''-Cresol, also 4-methylphenol, is an organic compound with the formula CH3C6H4(OH). It is a colourless solid that is widely used intermediate in the production of other chemicals. It is a derivative of phenol and is an isomer of ''o'' ...
, which is currently used as a
plasticizer A plasticizer ( UK: plasticiser) is a substance that is added to a material to make it softer and more flexible, to increase its plasticity, to decrease its viscosity, and/or to decrease friction during its handling in manufacture. Plasticiz ...
component for plastics. Between 1870 and 1873, Volkova published approximately two dozen articles in the Russian Chemical Society journal on the amides of aromatic sulfonic acids and some of their derivatives. In 1871, Volkova was the chair of a chemistry session and presented two papers at the Third Congress of Russian Naturalists in Kyiv. Compounds Volkova synthesized were among the new materials prepared by Russian chemists, which were exhibited at the World Industrial Exhibition in London in 1876. Despite a very short career, ended by poverty-related illness and premature death in 1876, Volkova carried out a remarkable amount of synthetic work and was highly regarded by scientific peers.


Scientific achievements

*Obtained in pure form ortho-toluene sulfonic acid, its acid chloride, and its amide (1870); *Synthesized para-tricresol phosphate from para-cresol; *Discovered the structure of toluene sulfonic acids; *Discovered that substitution of the hydrogen atom of the ammonia residue in the amides of sulfonic acids with an acid residue (e.g., the residue of benzoic acid) produces amide derivatives that show all the reactions of acids, as well as obtaining the corresponding acyl chlorides and amides.


Memory

The Volkova crater on Venus is named in honor of the scientist.


See also

*
Timeline of women in science This is a timeline of women in science, spanning from ancient history up to the 21st century. While the timeline primarily focuses on women involved with natural sciences such as astronomy, biology, chemistry and physics, it also includes women f ...
*
Julia Lermontova Julia Lermontova rus, Юлия Всеволодовна Лермонтова (21 December 1846 – 16 December 1919 Old Style and New Style dates, O.S. 2 January 1847 ), was a Russian chemist. She is known as the first Russian woman to ea ...
*
Nadezhda Ziber-Shumova Nadezhda Olimpievna Shumova later Ziber-Shumova (Russian: Надежда Олимпиевна Зибер-Шумова; 7 May 19_May">nowiki/>19_May.html" ;"title="19_May.html" ;"title="nowiki/>19 May">nowiki/>19 May">19_May.html" ;"title="nowi ...


References

{{DEFAULTSORT:Volkova, Anna Year of birth unknown 1876 deaths Chemists from the Russian Empire 19th-century women from the Russian Empire 19th-century women scientists 19th-century chemists Woman scientists from the Russian Empire