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Cyclopentadiene monomer in an ice bath. Cyclopentadiene production is usually not distinguished from dicyclopentadiene since they interconvert. They are obtained from coal tar (about 10–20 g/t) and by steam cracking of naphtha (about 14 kg/t). [8] To obtain cyclopentadiene monomer, commercial dicyclopentadiene is cracked by heating to around ...
1,3-Cyclopentanedione is an organic compound with the formula (CH 2) 3 (CO) 2. It is one of two isomeric cyclopentanediones, the other being 1,2-cyclopentanedione. The enol is predicted to be about 1-3 kcal/mol more stable than the diketo form. [1] The enol structure has been confirmed by X-ray crystallography. [2]
Cyclopentene is a chemical compound with the formula (CH 2) 3 (CH) 2. It is a colorless liquid with a petrol-like odor. It has few applications, and thus is mainly used as a minor component of gasoline, present in concentrations of less than 1%. [1] [2] It is one of the principal cycloalkenes.
cis-1,3-pentadiene. trans-1,3-pentadiene, also known as piperylene. 1,4-pentadiene, H 2 C=CH−CH 2 −CH=CH 2. [4] 2,3-pentadiene, H 3 C−CH=C=CH−CH 3, with two enantiomers (R and S). [5] Well known derivatives containing pentadiene groups include hexadienes, cyclopentadiene, and especially three fatty acids linoleic acid, α-linolenic acid ...
It is formed by the deprotonation of cyclopentadiene. The cyclopentadienyl anion is a ligand which binds to a metal in organometallic chemistry. [2] The first salt with this anion, potassium cyclopentadienide, was prepared by Johannes Thiele in 1901 [3] but there wasn't much interest in the topic until the discovery of ferrocene in the 1950s.
Structure of (t Bu 3 C 5 H 2) 2 Fe 2 N 2. The (tert-butyl)cyclopentadiene is prepared by alkylation of cyclopentadiene with tert-butyl bromide in the presence of sodium hydride and dibenzo-18-crown-6. [1] The intermediate in this synthesis is di-tert-butylcyclopentadiene. This compound is conveniently prepared by alkylation of cyclobutadiene ...
Through the efforts of Alder and coworker, the structure was deduced in 1931. [5] The spontaneous dimerization of neat cyclopentadiene at room temperature to form dicyclopentadiene proceeds to around 50% conversion over 24 hours and yields the endo isomer in better than 99:1 ratio as the kinetically favored product (about 150:1 endo:exo at 80 ...
The 1,3-dipolar cycloaddition is a ... cyclopentadiene* ... 1,3-Dipolar cycloaddition between an azomethine ylide and an alkene furnishes an azacyclic structure, ...