408363-34-8

Basic information

• Product Name: (N,N'-diphenyl-2,4-pentanediiminato)(N-η1-C6H4-N'-phenyl-2,4-pentanediiminato)chromium(III)
• Synonyms: (N,N'-diphenyl-2,4-pentanediiminato)(N-η1-C6H4-N'-phenyl-2,4-pentanediiminato)chromium(III)
• CAS NO: 408363-34-8
• Molecular Weight: 549.659
• Mol File: 408363-34-8.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: (N,N'-diphenyl-2,4-pentanediiminato)(N-η1-C6H4-N'-phenyl-2,4-pentanediiminato)chromium(III)(CAS DataBase Reference)
• NIST Chemistry Reference: (N,N'-diphenyl-2,4-pentanediiminato)(N-η1-C6H4-N'-phenyl-2,4-pentanediiminato)chromium(III)(408363-34-8)
• EPA Substance Registry System: (N,N'-diphenyl-2,4-pentanediiminato)(N-η1-C6H4-N'-phenyl-2,4-pentanediiminato)chromium(III)(408363-34-8)

Safety Data

• Hazardous Substances Data: 408363-34-8(Hazardous Substances Data)

Upstream product

• 327028-24-0 bis(N,N'-diphenyl-2,4-pentanediiminato)chlorochromium(III) 

Relevant articles and documents

The (PH)2nacnac ligand in organochromium chemistry

A novel class of β-diketiminato chromium complexes was prepared to serve as a homogeneous model system for the heterogeneous Phillips ethylene polymerization catalyst. (Ph)2nacnacCrCl2(THF)2 (1, (Ph)2nacnac = N,N′-diphenyl-2,4-pentanediimme anion) was found to polymerize ethylene in the presence of excess methylaluminoxane (MAO). Reaction of 1 with 1.0 equiv of an alkylzinc compound yielded dimeric, chloride-bridged monoalkyl complexes of the type [(Ph)2nacnacCrR(μ-Cl)THF]2 (R = Me (3a), Et (3b)). Reaction of 1 with 2.0 equiv of alkyllithium reagents resulted in a disproportionation to [(Ph)2nacnac]2Cr (2) and CrR4. 2 could be oxidized by treatment with tetrachloroethane to give trigonalbipyramidal [(Ph)2nacnac]2CrCl (5). Attempted alkylation of 5 with aluminum alkyls yielded the ortho-metalated product (Ph)2nacnac(η1-C6H4-Ph)nacnacCr (6). However, the chromium-(III) aryl complex [(Ph)2nacnac]2CrPh (4) could be synthesized by reaction of CrPh3(THF)3 with 2 equiv of (Ph)2nacnacH. Square-pyramidal 4 featured both a normal planar η2-nacnac and a nonplanar η3-nanac ligand. Thermolysis of 4 resulted in the loss of benzene along with the formation of 6. The crystal structures of 2, 3a, and 4-6 were determined by X-ray diffraction, Complexes 1 and 3-5 catalyzed the polymerization of ethylene when activated with MAO, but they did not catalyze the polymerization by themselves.