Kekulé von Stradonitz

Friedrich August Kekulé von Stradonitz ( September 7 is the 250th day of the year (251st in leap years). There are 115 days remaining. Events 1191 - Third Crusade: Battle of Arsuf - Richard I of England defeats Saladin at Arsuf. 1539 - Guru Angad Dev ji became the second Guru of the Sikhs 1776 - Worlds first submarine... September 7, Events January 8 - Hanging of body-selling murderer William Burke - his associate William Hare, who testified against him, is released January 19 - Johann Wolfgang von Goethes Faust premieres March 4 - Andrew Jackson succeeds John Quincy Adams as the President of the United States of America. March 22 - Greece receives... 1829 – July 13th is the 194th day (195th in leap years) of the year in the Gregorian Calendar, with 171 days remaining. Events 1558 - Battle of Gravelines: In France, Spanish forces led by Count Lamoral of Egmont defeat the French forces of Marshal Paul des Thermes at Gravelines. 1643 - English Civil... July 13, 1896 was a leap year starting on Wednesday (see link for calendar). Events January - April January 4 - Utah is admitted as the 45th U.S. state. January 5 - An Austrian newspaper reports that Wilhelm Röntgen discovered a type of radiation later known as X-rays. January 12 - H... 1896) was a The Federal Republic of Germany ( German: Bundesrepublik Deutschland) is one of the worlds leading industrialised countries, located in the heart of Europe. Due to its central location, Germany has more neighbours than any other European country: these are Denmark in the north, Poland and the Czech Republic in the... German Organic chemistry is the scientific study of the structure, properties, composition, reactions, and synthesis of organic compounds. History Organic chemistry as a science is generally agreed to have started in 1828 with Friedrich Woehlers synthesis of the organic, biologically significant compound urea by accidentally evaporating an aqueous solution of... organic chemist.

He was born in Map of Germany showing Darmstadt Darmstadt is a city in the Bundesland (federal state) of Hessen in Germany. Its population is estimated (2003) at 137,900. The city is located to the south of the conjoined metropolitan areas of Frankfurt and Wiesbaden. History Darmstadt was first mentioned towards the end... Darmstadt to an old Bohemia is also a place in the State of United States of America: see Bohemia, New York. Bohemia (Čechy in Czech, Böhmen in German) is a historical region in central Europe, occupying the western and middle thirds of the Czech Republic. With an area of 52,750 sq... Bohemian noble family. He was professor at This page is about the Belgian city. For other places called Ghent see Ghent (disambiguation). Ghent (Gent in Dutch, Gand in French, once Gaunt in English) is a municipality located in Flanders, one of the three regions of Belgium, and in the Flemish province of East Flanders, of which it... Ghent ( 1858 is a common year starting on Friday. Events January 14 - Felice Orsini and his accomplices fail to assassinate Napoleon III in Paris but their bombs kill 156 bystanders. Because of the involvement of French émigrés living in Britain, there is a brief anti-British feeling in France but... 1858- 1865 is a common year starting on Sunday. Events January 31 - American Civil War: Confederate General Robert E. Lee becomes general-in-chief. February - The Only known month in History without a Full moon. February 17 - American Civil War: Columbia, South Carolina burns as Confederate forces flee from advancing Union... 1865) and at Map of Germany showing Bonn Watershed of the Rhine river Bonn is a city in Germany (Population (2002 est): 310 930, the 19th largest city in Germany), in the Bundesland of North Rhine-Westphalia, located ca. 20 kilometres south of Cologne on the river Rhine. It was the capital of... Bonn. He studied various General Name, Symbol, Number Carbon, C, 6 Chemical series Nonmetals Group, Period, Block 14 (IVA), 2, p Density, Hardness 2267 kg/m3 0.5 (graphite) 3516 - 3525 kg/m3 10.0 (diamond) Appearance black (graphite) colourless (diamond) Atomic properties Atomic mass 12.0107 u Atomic radius (calc.) 70 (67) pm... carbon compounds, especially Benzene, C6 H6, PhH, or benzol is a colorless and flammable liquid with a pleasant, sweet smell. Benzene is a known carcinogen. It is a part of the car gasoline mixture and of napalm, it is an important solvent, and it is a precursor in the production of drugs, plastics... benzene, proposing a carbon ring for its structure. In 1857 was a common year starting on Thursday (see link for calendar). Events January 9 - Earthquake at Fort Tejon, California with an estimated magnitude of 7.9 February 16 - The National Deaf Mute College (later renamed Gallaudet University) is established in Washington, DC becoming the first school for the advanced... 1857 Kekulé proposed that carbon was Valence is a scientific term in chemistry to describe electrons in the outermost orbital. Valence electrons are used by atoms in chemical reactions and are generally the most important factor in determining which reactions can and cannot take place, especially in covalent bonding. In the American periodic table, the number... tetravalent.

He wrote that he discovered the ring shape of the Benzene, C6 H6, PhH, or benzol is a colorless and flammable liquid with a pleasant, sweet smell. Benzene is a known carcinogen. It is a part of the car gasoline mixture and of napalm, it is an important solvent, and it is a precursor in the production of drugs, plastics... benzene molecule after dreaming of a Families Acrochordidae Aniliidae Anomalepididae Anomochilidae Atractaspididae Boidae Bolyeriidae Colubridae Cylindrophiidae Elapidae Hydrophiidae Leptotyphlopidae Loxocemidae Pythonidae Tropidophiidae Typhlopidae Uropeltidae Viperidae Xenopeltidae Snakes are cold blooded legless reptiles closely related to lizards, which share the order Squamata. There are also several species of legless lizard which superficially resemble snakes, but are not... snake seizing its own tail. This dream came to him after years of studying the nature of carbon-carbon bonds. Kekulé claimed to solve the problem of how carbon atoms could bond to up to four other atoms at the same time. While his claims were well publicized and accepted, by the early 1920s Kekulé's own biographer came to the conclusion that Kekulé's understanding of the tetravalent nature carbon bonding depended on the previous research of Archibald Scott Couper (1831-1892) was the author of On a New Chemical Theory, Philosophical Magazine 16, 104-116 (1858) [as excerpted in Alembic Club Reprint #21, On a New Chemical Theory and Researches on Salicylic Acid[1]] Friedrich August Kekulé von Stradonitz claimed to solve the structure of Benzene... Archibald Scott Couper (1831-1892); further, the German Chemist Johann Josef Loschmidt (March 15, 1821 - July 8, 1895) was an Austrian physicist and chemist. Born in Počerny near Carlsbad (today in the Karlovy Vary Region of the Czech Republic), he became professor for physical chemistry at the University of Vienna in 1868. His fields of research were... Josef Loschmidt (1821-1895) had earlier posited a cyclic structure for benzene as early as 1862, although he had not actually proved this structure to be correct.

In 1895 Kekule was enobled by Emperor Wilhelm II German Emperor and King of Prussia Wilhelm II of Prussia and Germany, Friedrich Wilhelm Viktor Albert von Hohenzollern ( January 27, 1859– June 4, 1941) was the last German Emperor ( Kaiser) and the last King (König) of Prussia, ruling from 1888 to 1918. Known popularly to... William II, giving him the right to add "von Stradonitz" to his name, referring to an ancient possession of his family in Stradonice, Bohemia. Of the first five The Nobel Prizes (pronounced no-BELL or no-bell) are awarded annually to people who have done outstanding research, invented groundbreaking techniques or equipment, or made outstanding contributions to society. It is generally regarded as the supreme commendation in the world today. The prizes were instituted by the final will... Nobel Prizes in Chemistry, his students won three.

See also

• Benzene, C6 H6, PhH, or benzol is a colorless and flammable liquid with a pleasant, sweet smell. Benzene is a known carcinogen. It is a part of the car gasoline mixture and of napalm, it is an important solvent, and it is a precursor in the production of drugs, plastics... Benzene
• Non-Kekulé molecule
• There are many stories that inform our understanding of the history of science and technology. Some of these are perfectly true, some are questionable, and some are known to be false. Our understanding, appreciation and commitment to science is supported by ritual and stories. Science itself can be studied through... Scientific mythology

External links

• Couper and Carbon bonds (http://classes.yale.edu/chem125a/125/history99/5Valence/Couper/Couper.html)
• Kekule, Couper and dreams of Benzene (http://classes.yale.edu/chem125a/125/history99/5Valence/Kekule/Kekule.html)
• Josef Loschmidt, Physicist and Chemist (http://www.physicstoday.org/pt/vol-54/iss-3/p45.html)
• Loschmidt's Benzene structure (http://www.physicstoday.org/pt/vol-54/iss-3/captions/p45cap4.html)