Mitscherlich. Eilhardt

In 1825 Michael Faraday isolated a new hydrocarbon from illuminating gas which he called bicarburet of hydrogen Nine years later Eilhardt Mitscherlich of the University of Berlin prepared the same substance by heating benzoic acid with lime and found it to be a hydrocarbon having the empirical formula C H ... 

In Section 3.1.1 we encountered the crystallographer and chemist Eilhardt Mitscherlich who around 1818 discovered the phenomenon of polymorphism in some substances, such as sulphur. This was the first recognition that a solid phase... 

In 1825 Michael Faraday (1791—1867) discovered an unknown substance that was produced from heated whale oil. Later, Eilhardt Mitscherlich (1794—1863) isolated this new compound and named it benzene. 

Benzene was discovered in 1825 by Michael Faraday who identified it from a liquid residue of heated whale oil. Faraday called the compound bicarburet of hydrogen and its name was later changed to benzin by Eilhardt Mitscherlich (1794—1863) who isolated the compound from benzoin. Benzene s formula indicates it is highly unsaturated. This would suggest benzene... 

In 1834, Eilhardt Mitscherlich conducted vapor density measurements on benzene. Based on data from these experiments, he determined the molecular formula of benzene to be C6H6. This formula suggested that the benzene molecule should possess four modes of unsaturation because the saturated alkane with six carbon atoms would have a formula of C6HI4. These unsaturations could exist as double bonds, a ring formation, or a combination of both. 

Later, Eilhardt Mitscherlich heated benzoic acid with limestone and synthesized benzene. He also found that benzene had the molecular formula CgHg. 

Pasteur was only 26 years old at the time and was unknown in scientific circles. He was concerned about the accuracy of his observations because a few years earlier, the well-known German organic chemist Eilhardt Mitscherlich had reported that crystals of the same salt were all identical. Pasteur immediately reported his findings to Jean-Baptiste Biot and repeated the experiment with Biot present. Biot was convinced that Pasteur had successfully separated the enantiomers of sodium ammonium tartrate. Pasteur s experiment also created a new chemical term. Tartaric acid is obtained from grapes, so it was also called racemic acid (racemus is Latin for a bunch of grapes ). When Pasteur found that tartaric acid was actually a mixture of enantiomers, he called it a racemic mixture. Separation of enantiomers is called the resolution of a racemic mixture. 

In 1834, Eilhardt Mitscherlich correctly determined benzene s molecular formula (CgHg) and decided to call it benzin because of its relationship to benzoic acid, a known substituted form of the compound. Later its name was changed to benzene. 

Again, a German chemist, Eilhardt Mitscherlich (1794-1863), had discovered, by 1819, that compounds known to have similar compositions tend to crystallize together, as though molecules of one intermingled with the similarly shaped molecules of the other. 

In 1834 the German chemist Eilhardt Mitscherlich (University of Berlin) synthesized benzene by heating benzoic acid with calcium oxide. Using vapor density measurements, Mitscherlich further showed that benzene has the molecular formula CeHe ... 

Already in the middle of the 19th century, Eilhardt Mitscherlich wrote ... 

Adolph von Baeyer (1835-1917) was another major German chemist, who was somewhat difficult to link to others. His doctoral work was suggested and partially supervised by Friedrich Kekule (1829-1896), who at that time (1856-58) was an assistant of Bunsen at Heidelberg. However, the actual thesis of von Baeyer was submitted to the faculty of the University of Berlin (nominal reader was Eilhardt Mitscherlich) in 1858, and the degree was issued by this last University. Therefore, von Baeyer is linked to Kekul and Bunsen. 

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