4045-52-7

Usage

Uses

Used in Pharmaceutical Industry:
1,3-Cyclopentadiene, 2,5-dimethylis used as a starting material for the synthesis of various pharmaceuticals due to its unique reactivity and properties.
Used in Pesticide Industry:
1,3-Cyclopentadiene, 2,5-dimethylis used as a starting material for the synthesis of various pesticides, contributing to the development of new and effective pest control agents.
Used in Polymer Industry:
1,3-Cyclopentadiene, 2,5-dimethylis used as a starting material for the synthesis of various polymers, enabling the creation of new materials with specific properties.
Used in Laboratory Research:
1,3-Cyclopentadiene, 2,5-dimethylis used as a common building block in the synthesis of complex organic molecules, facilitating the advancement of organic chemistry and the discovery of new compounds.
Used in Organometallic Chemistry:
1,3-Cyclopentadiene, 2,5-dimethylis used as a ligand in organometallic chemistry, playing a crucial role in the development of new organometallic complexes and their applications.
Used in Catalyst Development:
1,3-Cyclopentadiene, 2,5-dimethylis used in the development of new catalysts for chemical reactions, contributing to the improvement of reaction efficiency and selectivity in various chemical processes.

Upstream product

• 23685-97-4 1,3-dimethylcyclopent-2-en-1-ol 
• 2758-18-1 3-Methyl-2-cyclopenten-1-one 
• 5194-51-4 (2E,4E)-hexa-2,4-diene 

Relevant academic research and scientific papers

Production of alkali metal cyclopentadienylide and production of dihalobis ( eta -substituted-cyclopentadienyl) zirconium from alkali metal cyclopentadienylide

A process for producing an alkali metal cyclopentadienylide is disclosed which comprises reacting in a solvent an alkali metal hydride with a disubstituted or trisubstituted 1,3-cyclopentadiene. Further, a process for producing a dihalobis( eta -substituted-cyclopentadienyl)zirconium is disclosed which comprises reacting a zirconium halide with the above alkali metal cyclopentadienylide. The former process enables performing the reaction between the disubstituted or trisubstituted 1,3-cyclopentadiene and the alkali metal hydride at an easily controllable temperature of room temperature to about 150 DEG C. and also enables obtaining the alkali metal cyclopentadienylide in high yield. The latter process enables obtaining the dihalobis( eta -substituted-cyclopentadienyl)zirconium in high yield.

Chemistry of gem-Dihalocyclopropanes. XX. The Effect of Methyl and Phenyl Substituents on the Vinylcyclopropylidene-Cyclopentenylidene Rearrangement

Reactions of gem-dibromocyclopropanes of the general structure 1 with methyllithium have been studied.In the most cases cyclopentadienes and/or vinylallenes are the products formed.The results obtained give evidence of a profound substituent effect on the carbene-carbene rearrangement leading to cyclopentadienes.We believe the effect is essentially steric in origin.The results support the mechanism proposed for the rearrangement.

An Electron Spin Resonance Study of the Methylcyclopentadienyl Radicals, MenH5-nC5 (n=1-5)

The radicals MenC5H5-n have been generated by photolysis of the corresponding hydrocarbons (n=3-5) or mercury derivatives (n=0-5) and their e.s.r. spectra have been recorded.The spectra are interpreted in terms of thermal population of the ψA and ψS molecular orbitals, for which the predicted hyperfine coupling constants are calculated by the McLachlan equation, taking λ 0.75 and Q(C5H5) -30 and Q(Me5C5) 31.85 G.The energy separations between the ψA and ψS MOs can be rationalised on the assumption that a methyl substituent on a carbon atom of the cyclopentadienyl carrying a unit ?-electron has a destablising interaction, within a factor of two, of 10 kJ mol-1.