Search results
Results from the WOW.Com Content Network
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 (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 with tert-butyl bromide under phase-transfer ...
For the preparation of some particularly robust complexes, e.g. nickelocene, cyclopentadiene is employed in the presence of a conventional base such as KOH. When only a single Cp ligand is installed, the other ligands typically carbonyl, halogen, alkyl, and hydride.
Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Help; Learn to edit; Community portal; Recent changes; Upload file
Cyclopentadienone is an organic compound with molecular formula C 5 H 4 O. The parent cyclopentadienone is rarely encountered, because it rapidly dimerizes. [1] Many substituted derivatives are known, notably tetraphenylcyclopentadienone.
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.
Pentacyanocyclopentadiene is a derivative of cyclopentadiene with five cyano groups with the molecular formula C 5 H(CN) 5. The corresponding anion, pentacyanocyclopentadienide, is a ligand with the molecular formula C 5 (CN) − 5. In contrast to other anions based on a C 5 ring unit it binds to metals through the pendant cyano groups rather ...
Trimethylsilyl cyclopentadiene is an organosilicon compound with the chemical formula C 5 H 5 Si(CH 3) 3. It exists as a colorless liquid. It exists as a colorless liquid. It is used in the synthesis of some metal cyclopentadienyl complexes and has attracted interest for its fluxional structure .