The Wittig Reaction -- Lab Record Essay

INTRO

The purpose of this kind of experiment is usually to synthesize trans-9-(2-phenylethenyl) anthracene via benzyltriphenylphosphonium chloride and 9-anthraldehyde through the effect mechanism named the Wittig Reaction. The Wittig Reaction allows the chemist to synthesize phosphoranes in the laboratory with relative ease. An even more recent and cheap version in the reaction may be the Wittig-Horner reaction (1).

SUMMARY

Georg Wittig was a The german language chemist and Nobel Prize winner in 1979 for the Wittig response (1). He was born in Berlin, about June 16, 1897, and died Aug 26, 1987 (1). Wittig discovered the road to alkenes through ylide molecules (1). Wittig was educated formerly at Tubingen; Wittig spent periods at Braunschweig, Freigurg, back to Tubingen again prior to taking up the post while director from the organic chemistry department in Heidelberg (1). Wittig started to be an nestor professor in 1967, where he remained before the end of his notable career (1). In 1967, he gained the Otto Hahn Reward, and in lates 1970s, he and Herbert C. Brown were jointly awarded the Nobel Prize because of their development of the application of boron and phosphorus-containing compounds for crucial reagents in organic synthesis (1).

The inspiration of the Wittig reaction is definitely not complex. Phosphorus is a second row component - in-group 5 -- like nitrogen, but in contrast to nitrogen, is able to expand the valencey coming from 3 to 4, 5, or even 6th (1). The stable 5 valencies happen to be met in compounds like phosphoric chemical p and PCL (1). Wittig discovered that phosphines, which are the phosphorus equivalent of amines, very easily form phosphonium salts with alkyl halides and that these salts conveniently lose HX with good base. This device is called a great ylide or a phosphorane. The ylide can be described as polar molecule with a carbanionic carbon.

Number 1 . Making a phosphorus ylid (1)

In relation to stereochemistry, such as cis/trans, or E/Z, is still not fully realized in the response (2). Triphenylphosphines tend normally to give...

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