Detail of "12107-56-1"

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Synthesis and evaluation of substituted pyrazoles palladium(II) complexes as ethylene polymerization catalysts

Some chemicals with cas registry numbers like 488760-42-5 and 12107-56-1 are also used. Synthesis and evaluation of substituted pyrazoles palladium(II) complexes as ethylene polymerization catalysts. Li, Kelin; Darkwa, James; Guzei, Ilia A.; Mapolie, Selwyn F. ( Department of Chemistry, University of the Western Cape, Bellville 7535, S. Afr.). Journal of Organometallic Chemistry, 660(1), 108-115 (English) 2002 Elsevier Science B.V. CODEN: JORCAI. ISSN: 0022-328X. DOCUMENT TYPE: Journal CA Section: 35 (Chemistry of Synthetic High Polymers) Section cross-reference(s): 29, 67, 75, 78 The substituted pyrazole palladium complexes, (3,5-tert-Bu2pz)2PdCl2 (1) (3,5-Me2pz)2PdCl2 (2), (3-Mepz)2PdCl2 (3) and (pz)2PdCl2 (4) (pzH = pyrazole), can be prepd. from the reaction of (COD)PdCl2 (COD = 1,5-cyclooctadiene) with the appropriate pyrazole. The chloromethyl deriv., (3,5-tert-Bu2pz)2PdCl(Me) (5), was prepd. from (COD)PdClMe and tert-Bu2pzH. X-ray crystal structure detn. of 1 and 5 established their structures in the solid state to be the trans-isomer. After activation of 1-4 and 5 with methylaluminoxane (MAO) the resulting palladium complexes were used as catalysts in ethylene polymn., yielding linear high-d. polyethylene (HDPE). The highest activity was obsd. for (3,5-tert-Bu2pz)PdClMe. .

Helical chirality control of palladium complexes that bear a tetrakis(phosphanyl)terphenyl ligand: Application as asymmetric Lewis acid catalysts

Helical chirality control of palladium complexes that bear a tetrakis(phosphanyl)terphenyl ligand: Application as asymmetric Lewis acid catalysts. Aikawa, Kohsuke; Mikami, Koichi (Department of Applied Chemistry, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152-8552, Japan). Angewandte Chemie, International Edition, 42(44), 5458-5461 (English) 2003 Wiley-VCH Verlag GmbH & Co. KGaA. CODEN: ACIEF5. ISSN: 1433-7851. DOCUMENT TYPE: Journal CA Section: 78 (Inorganic Chemicals and Reactions) Section cross-reference(s): 24, 67, 75 Both axial and helical chirality are generated by complexation of the novel tetrakis(diphenylphosphino)terphenyl (I) (tetraphos) ligand to a metal center. The helical nature of the ligand was confirmed, and enantiopure Pd complexes controlled by diamines. Chiral complexes were prepd. from racemic [Pd2(MeCN)4(tetraphos)] by using 3,3'-dimethyl-2,2'-diamino-1,1'-binaphthyl or 2,2'-diamino-1,1'-binaphthyl for enantiomeric resoln. and isomerization. These complexes were applied as asym.In this experiment, several chemicals are used like 651321-01-6 and 12107-56-1 Lewis acid catalysts in carbonyl-ene reactions of methylenecyclohexene. The crystal structure of [Pd2Cl4(tetraphos)]×2MeOH is also reported. .