2041-08-9

Basic information

• Product Name: Octaphenylcycloocta-1,3,5,7-tetrene
• Synonyms: 1,2,3,4,5,6,7,8-Octaphenylcycloocta-1,3,5,7-tetrene;Octaphenylcycloocta-1,3,5,7-tetrene;Octaphenylcyclooctatetraene
• CAS NO: 2041-08-9
• Molecular Formula: C₅₆H₄₀
• Molecular Weight: 0
• Mol File: 2041-08-9.mol
• Article Data: 6

Chemical Properties

• Appearance: /
• CAS DataBase Reference: Octaphenylcycloocta-1,3,5,7-tetrene(CAS DataBase Reference)
• NIST Chemistry Reference: Octaphenylcycloocta-1,3,5,7-tetrene(2041-08-9)
• EPA Substance Registry System: Octaphenylcycloocta-1,3,5,7-tetrene(2041-08-9)

Safety Data

• Hazardous Substances Data: 2041-08-9(Hazardous Substances Data)

Upstream product

• 501-65-5 diphenyl acetylene 
• 201230-82-2 carbon monoxide 
• 21289-08-7 (E,E)-(1,2,3,4-tetramethyl-1,3-butadien-1,4-ylidene)-dilithium 
• 19914-88-6 <4-Brom-1,2,3,4-tetraphenyl-cis,cis-butadien-(1,3)-yl>-dimethylzinnbromid 
• 624-48-6 dimethyl cis-but-2-ene-1,4-dioate 

Relevant articles and documents

NEUARTIGE ALUMINACYCLOPENTADIENE MIT SPIRO-AT-STRUKTUR UND DEREN VERHALTEN GEGENUEBER NICKEL(0)- UND NICKEL(II)-VERBINDUNGEN

Depending on the stoichiometry and solvent conditions aluminacycles III or IV are formed from the reaction of 1,2,3,4-tetraphenyl-1,4-dilithiumbutadiene (I) with AlCl3 (II) (see Scheme 1).It has beens shown that while IV undergoes intramolecular ionic complex formation to give IVa, III gives IIIa only to a smaller extent.III as well as IV take up two (COD)Ni0 units forming polynuclear complexes.The proposed structures are discussed.Both III and IV react with NiBr2 to give octaphenylcyclooctatetraene.In the presence of 1,2-bis(diphenylphosphino)ethane (DPPE) the complex DPPE-tetraphenylcyclobutadienenickel(0) can be isolated.

Synthesis of octasubstituted cyclooctatetraenes and their use as electron transporters in organic light emitting diodes

The synthesis and characterization of octasubstituted cyclooctatetraenes (COTs) as well as their use as electron transporting materials in organic LEDs are reported. Tetraaryl-tetraarylethynyl-cyclooctatetraenes [C8Ar4(C≡CAr)4/

ORGANIC CHEMISTRY OF SUBVALENT TRANSITION METAL COMPLEXES XI. OXIDATIVE ADDITIONS OF NICKEL(0) COMPLEXES TO CARBON-CARBON BONDS IN ALKYNES: NICKELIRENES AND NICKELOLES AS CATALYTIC CARRIERS IN THE OLIGOMERIZATION OF ALKYNES

The formation of 2,3,4,5-tetraphenylnickelole-bis(triphenylphosphine) (IIIa) and 2,3,4,5-tetraphenylnickelole-bis(1,2-diphenylphosphino)ethane (IIIb), either from (E,E)-1,2,3,4-tetraphenyl-1,3-butadien-1,4-ylidenedilithium (I) and the corresponding nickel(II) chloride-phosphine complexes (II) or from the reduction of η4-tetraphenylcyclobutadienenickel(II) bromide dimer (XII) in the presence of phosphines, proceeds in good yields.Nickelole IIIa displays physical and chemical properties consistent with its structure and is a catalyst for the trimerization of diphenylacetylene.Nickelole IIIb is a highly associated structure but in its chemical response to alkynes, HOAc, O2, Br2, NaAlEt2H2 and heat displays the properties of a nickelole, rather than a cyclobutadienenickel(0) complex.Attempts to generate IIIb photochemically from η4-1,5-cyclooctadiene(η4-tetraphenylcyclopentadienone)nickel and diphos failed, but it was shown that structural types, such as η4-tetraphenylcyclopentadienone(diphos)nickel (a model for the structure suggested by Hoberg and Richter for IIIb), are unstable.Oligomerizations of diphenylacetylene by bis(1,5-cyclooctadiene)nickel were retarded by conducting the reaction in THF or in the presence of diphos.This retardation permitted the interception of products (cis-stilbene and (E,E)-1,2,3,4-tetraphenyl-1,3-butadiene)diagnostic for the intermediacy of nickelirenes and nickeloles.Deuterium labeling verified the presence of carbo-nickel bonds.These trapping experiments, together with findings on the thermal behavior of nickeloles, are combined into a comprehensive view of the cyclotrimerization, cyclotetramerization and linear polymerization of alkynes by nickel(0).