31598-70-6

Basic information

• Product Name: cis-cyclooct-4-enone
• Synonyms: cis-cyclooct-4-enone
• CAS NO: 31598-70-6
• Molecular Weight: 124.183
• Mol File: 31598-70-6.mol
• Article Data: 3

Chemical Properties

• CAS DataBase Reference: cis-cyclooct-4-enone(CAS DataBase Reference)
• NIST Chemistry Reference: cis-cyclooct-4-enone(31598-70-6)
• EPA Substance Registry System: cis-cyclooct-4-enone(31598-70-6)

Safety Data

• Hazardous Substances Data: 31598-70-6(Hazardous Substances Data)

Upstream product

• 1552-12-1 1,5-cis,cis-cyclooctadiene 
• 1421969-83-6 (1,5-cyclooctadiene)(N,N-dimethyl-N′,N″-bis(2,6-dimethylphenyl)guanidinato)peroxoiridium(III) 
• 1421969-82-5 (1,5-cyclooctadiene)(N,N-dimethyl-N′,N″-bis(4-methoxyphenyl)guanidinato)peroxoiridium(III) 
• 1421969-81-4 (1,5-cyclooctadiene)(N,N-diethyl-N′,N″-bis(4-methylphenyl)guanidinato)peroxoiridium(III) 
• 1421969-80-3 (1,5-cyclooctadiene)(N,N-dimethyl-N′,N″-bis(4-methylphenyl)guanidinato)peroxoiridium(III) 
• 1421969-79-0 (1,5-cyclooctadiene)(N,N-diethyl-N′,N″-diphenylguanidinato)peroxoiridium(III) 
• 1361006-59-8 (1,5-cyclooctadiene)(N,N-dimethyl-N′,N″-diphenylguanidinato)peroxoiridium(III) 
• 201230-82-2 carbon monoxide 

Downstream Products

• 1740-63-2 3-vinylcyclohexanone 
• 28399-88-4 4,5-Epoxycyclooctanon 
• 23691-51-2 cyclo-oct-4-enone p-tosylhydrazone 
• 68344-36-5 C₁₅H₁₉NO₃S 
• 4277-34-3 (Z)-cyclooct-4-enol 
• 70423-71-1 (Z)-cyclooct-4-en-1-amine 
• 125736-07-4 (1R,2R,6R)-9-Aza-bicyclo[4.2.1]nonane-2,9-dicarboxylic acid 9-tert-butyl ester 2-methyl ester 
• 147330-13-0 methyl N-(4-cyclooctenyl)carbamate 
• 66633-23-6 (Z)-cyclooct-1-ene-5-yne 
• 132637-52-6 N-(cyclo-oct-4-enyl)-N'-p-tosylhydrazine 
• 51953-73-2 9-Acetyl-1-phenylbicyclo<3.3.1>nonan 
• 51953-76-5 1-Phenyl-9-methylenebicyclo<3.3.1>nonane 
• 51953-77-6 9-Chloromethyl-1-phenyl-bicyclo[3.3.1]nonane 
• 51953-75-4 (1-Phenyl-bicyclo[3.3.1]non-9-yl)-methanol 

Relevant articles and documents

Guanidinato complexes of iridium: Ligand-donor strength, O2 reactivity, and (alkene)peroxoiridium(III) intermediates

A series of seven [Ir{ArNC(NR2)NAr}(cod)] complexes (1a-1g; where R = Me or Et; Ar = Ph, 4-MeC6H4, 4-MeOC 6H4, 2,6-Me2C6H3, or 2,6-iPr2C6H3; and cod = 1,5-cyclooctadiene) were synthesized by two different methods from the neutral guanidines, ArN-C(NR2)NHAr, using either MeLi and [{Ir(cod)} 2(μ-Cl)2] or [{Ir(cod)}2(μ-OMe) 2]. Reaction of 1a-1g with CO produced the corresponding [Ir{ArNC(NR2)NAr}(CO)2] complexes (2a-2g), which were characterized by NMR and solution- and solid-state IR spectroscopy. Complexes 1b (R = Et, Ar = Ph), 1d (R = Et, Ar = 4-MeC6H4), 1f (R = Me, Ar = 2,6-Me2C6H3), and 2b (R = Et, Ar = Ph) were characterized by X-ray crystallography as mononuclear complexes with a guanidinato-κ2N,N′ ligand and a cod or two CO ligands coordinated to the Ir center in a distorted square-planar environment. On the basis of the CO stretching frequencies of 2a-2g [avg. νCO (n-pentane) = 2016-2019 cm-1] and the alkene 13C chemical shifts of 1a-1g [δ(13CC-C) = 58.7-61.0 ppm], the donor strength of the guanidinato ligands was evaluated and compared to that of related monoanionic ligands. Reaction of 1a-1g in solution with O2 at 20 C afforded (alkene)peroxoiridium(III) intermediates, [Ir{ArNC(NR 2)NAr}(cod)(O2)] (3). The steric properties of the supporting ligand play a decisive role in O2 binding in that complexes without ortho substituents react largely irreversibly with O 2 (1a-1e; where Ar = Ph, 4-MeC6H4 or 4-MeOC6H4), whereas complexes with ortho substituents exhibit fully reversible O2 binding (1f and 1g; where Ar = 2,6-Me2C6H3 or 2,6-iPr 2C6H3). Complexes 3a-3f were characterized by 1H NMR and IR spectroscopy (νOO = 857-872 cm -1). Decay of the new intermediates and subsequent reaction with cod produced 4-cycloocten-1-one and the respective IrI precursor.

LIQUID PHASE OXIDATION OF CYCLIC POLYOLEFINS WITH MOLECULAR OXYGEN. PART II. CIS,CIS-1,5-CYCLOOCTADIENE AUTOOXIDATION

The autooxidation of 1,5-cyclooctadiene has been studied.Cyclooctadiene easily undergoes oxidation by molecular oxygen.Depending on the reaction procedure and the degree of conversion, polymeric or monomeric oxidated products are the dominating products with the preservation of eight-membered ring.The content of 1,2-epoxycyclooctene-5 in the product may exceed 50percent.The reaction was found to be of a free-radical character.An initiation and propagation scheme of the autooxidation is proposed.