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Cyclopentadiene is a highly reactive diene in the Diels–Alder reaction because minimal distortion of the diene is required to achieve the envelope geometry of the transition state compared to other dienes. [11] Famously, cyclopentadiene dimerizes. The conversion occurs in hours at room temperature, but the monomer can be stored for days at ...
The process, which is catalyzed by platinum supported by aluminium oxide, is exemplified in the conversion methylcyclohexane (a naphthene) into toluene (an aromatic). [2] Dehydrocyclization converts paraffins (acyclic hydrocarbons) into aromatics. [3] A related aromatization process includes dehydroisomerization of methylcyclopentane to benzene:
1,2-Cyclopentanedione is the organic compound with the formula (CH 2) 3 (CO) 2. It is one of two isomeric cyclopentanediones, the other being 1,3-cyclopentanedione . It was first prepared by base-induced condensation of di ethylglutarate with diethyloxalate , followed by hydrolysis of the resulting diketodiester followed by decarboxylation. [ 1 ]
[8]: 248 (η 6-C 6 H 6)M(CO) 3 complexes have been incorporated into high surface area porous materials. [15] (η 6-C 6 H 6)M(CO) 3 complexes serve as models for the interaction of metal carbonyls with graphene and carbon nanotubes. [16] The presence of M(CO) 3 on extended π-network materials has been shown to improve electrical conductivity ...
1,2,3,4,5-Pentakis(4-butylphenyl)-1,3-cyclopentadiene is an organochemical compound from the diene group and a cyclopentadiene derivative. The anion of this compound is used as a sterically demanding ligand, often abbreviated as Cp [BIG] , in the organometallic chemistry of sandwich compounds .
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] It and 1,2-pentadiene are the least common isomers of pentadiene. Well known derivatives containing pentadiene groups include hexadienes, cyclopentadiene, and especially ...
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 ...
The Buchner ring expansion reaction was first used in 1885 by Eduard Buchner and Theodor Curtius [1] [2] who prepared a carbene from ethyl diazoacetate for addition to benzene using both thermal and photochemical pathways in the synthesis of cycloheptatriene derivatives. The resulting product was a mixture of four isomeric carboxylic acids ...