Thenard, Louis

Thenard, Louis Jacques (1777-1857) French chemist and professor at ficole Polytechnique in Paris he published a textbook, and his Traite de chimie elimentaire, theorique et pratique (4 vols., Paris, 1813-16), which served as a standard for a quarter of a century. 

Thenard, Louis Jacques. 1807a. Memoire sur les ethers. Memoires de Physique et de Chimie de la Socidtd d Arcueil 1 73-114. 

Joseph Louis Gay-Lussac (1778-1850) and Louis Jacques Thenard (1777-1857). 

Boron (Buraq in Arabic/Burah in Persian, which is the word for white, the color being attributed to borax (sodium tetraborate, Na2B4O7.10H2O)) was discovered in 1808 independently by the British Chemist, Sir Humphry Davy, and two French chemists, Joseph Louis Gay-Lussac and Loius Jacques Thenard.1 They isolated boron in 50% purity by the reduction of boric acid with sodium or magnesium. The Swedish chemist Jons Jakob Berzilius identified boron as an element in 1824. The first pine sample of boron was produced by the American chemist William Weintraub in 1909. Boron does not appear in nature in elemental form, but is found in its compounded... 

Alexander von Humboldt (1769-1859) recognised meteorites as being a source of extraterrestrial material. Several well-known chemists carried out analyses of material from meteorites, starting at the beginning of the nineteenth century. Thus Louis-Jacques Thenard (1777-1857) found carbon in Alais meteorites these results were confirmed in 1834 by Jons Jacob Berzelius, who by dint of very careful work was also able to detect water of crystallisation in meteoritic material. 

Ecole Polytechnique, the Institute of Egypt, and the suburban Arcueil estates of Laplace and Berthollet. Like Gay-Lussac, the chemists Louis N. Vauquelin, Michel Eugene Chevreul, and Louis Jacques Thenard admitted well-recommended students to their private chemical laboratories. By the 1830s, Dumas and Victor Regnault were training students in larger numbers as part of the expected chemical curriculum. 84... 

Boron - the atomic number is 5 and the chemical symbol is B. The name derives from the Arabic buraq for white . Although its compounds were known for thousands of years, it was not isolated until 1808 when the French chemists Louis-Joseph Gay-Lussac and Louis-Jacques Thenard obtained boron in an impure state and the English chemist, Humphry Davy, prepared pure boron by electrolysis. 

In 1808 two French chemists, Joseph Louis Gay-Lussac (1778-1850) and Louis-Jacques Thenard (1777-1857), experimented along the same lines as Davy and should also be given some credit for the discovery of these elements. The Frenchmen named the new element bore, and Davy called it boracium. ... 

Boron B 1808 (London England and Paris, France) Sir Humphry Davy (British) and Joseph Gay-Lussac, Louis Thenard (both French) 175... 

British chemist Sir Humphry Davy and French chemists Joseph-Louis Gay-Lussac, Louis-Jacques Thenard Nearly as hard as diamond, this brittle crystal is rare in pure form combines to form borax also valuable in the production of glass and semiconductors. 

Louis-Jacques Thenard, 1777-1857. Professor of chemistry at the Ecole Poly-technique. Discoverer of hydrogen peroxide. Collaborator with Gay-Lussac m his researches on potassium, boron, lodme, and chlorine. He also investigated many fatty acids, esters and ethers... 

Louis-Joseph Gay-Lussac was bom at St. Leonard, near Limoges, on December 6, 1778, and was therefore just eleven days older than Davy. After receiving his elementary education in St. Leonard he went to Paris, and when he was nineteen years old, he enrolled at the Ecole Polytechnique, where he soon became acquainted with his lifelong friend and collaborator, Thenard. 

With his colleague Louis-Jacques Thenard (1777-1857), Gay-Lussac did considerable work with electrochemistry to produce significant amounts of elemental sodium and potassium, highly reactive and useful substances that were used to isolate and discover the element boron. Gay-Lussac also completed extensive studies of acids and bases and was the first to deduce that there were binary (two element) acids such as hydrochloric acid (HC1) in addition to the known oxygen-containing acids like sulfuric acid (H2S04). Additionally, he was able to determine the chemical composition of prussic acid to be hydrocyanic acid (HCN) and was considered the foremost practitioner of organic analysis. 

The French chemist Louis Jacques Thenard first enunciated electrochemical nature of corrosion phenomenon explicitly in 1819. Some research activities that led to the firm electrochemical foundations of corrosion process are summarized below ... 

News of Davy s success had traveled to France, where emperor Napoleon Bonaparte (1769—1821) grew concerned about the scientific reputation of his country. He ordered larger and better equipment built for his scientists. He wanted them to surpass Davy in his work on metals. This equipment was designed especially for two French chemists, Louis Jacques Thenard (1777-1857) and Joseph Louis Gay-Lussac (1778-1850). 

French chemists Louis Jacques Thenard and Joseph Louis Gay-Lussac discover boron. Davy isolates the element a few days after its discovery has been announced. 

Joseph Louis Gay-Lussac and Louis Thenard prepare impure amorphous silicon from silicon tetrafluoride. 

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